MORWET D 425 POWDER

CAS Number: 68425-94-5, identified for the polymeric substance in a published grade safety data sheet; confirm against the current regional documentation for the supplied material.
EC Number: No conventional EC number is assigned here; the corresponding CAS entry is associated with ECHA List Number 614-476-8, which should be distinguished from a conventional EINECS identifier.
Molecular Formula: No single fixed molecular formula represents the commercial polymeric condensate.
Molecular Weight: A single exact molecular weight is not applicable; no verified grade specification for average molecular weight or its distribution is stated here.
Chemical Family: Anionic alkylnaphthalene sulfonate condensate, sodium salt.
INCI Name: No grade-specific cosmetic INCI designation is confirmed for this industrial profile.
E Number: No food additive E number is established for Morwet D 425 Powder in this profile.
Physical Form: Brown powder; the Morwet D 425 Powder specification states powder at 25°C.
Melting Point: No verified grade-specific value is available in the consulted safety document.
Boiling Point: Not applicable to the supplied polymeric powder as a conventional boiling liquid.
Viscosity: Dynamic and kinematic viscosity are not applicable to the dry powder at 20°C; solution viscosity requires a defined concentration and test method.
Density: No verified relative density or bulk density value is stated in the consulted grade safety document.
Water Solubility: Soluble; a quantitative saturation concentration is not established here.

SYNONYMS

Morwet D 425 Powder
Morwet D-425 Powder
Morwet D 425
Morwet D-425
Alkylnaphthalene sulfonic acid–formaldehyde polymer, sodium salt
Sodium alkylnaphthalene sulfonate condensate
Alkyl naphthalene sulfonate condensate, sodium salt
Naphthalene sulfonate condensate dispersant
Sodium naphthalene sulfonate formaldehyde condensate
Anionic NSC dispersant
Powdered naphthalene sulfonate dispersant
These names describe the grade or its chemical family; a shared family description does not establish equivalence between commercial dispersants.

APPLICATIONS

Aqueous suspension concentrates: Morwet D 425 Powder is used as a primary dispersant in SC formulations, where finely divided pesticide active ingredients are suspended in an aqueous continuous phase. The intended function of Morwet D 425 Powder is to help establish a manageable mill base and maintain particle separation as newly generated surfaces become exposed. The complete formulation still requires suitable control of sedimentation, foam, microbiological stability and temperature-dependent behavior.

SC development ranges: Published formulation guidance gives 2–3% w/w Morwet D-425 for a 480 g/L SC and 3–5% w/w for a 720 g/L SC. These percentages refer to the dispersant addition to the formulation, whereas g/L describes pesticide active loading by volume. They are starting ranges for development, not interchangeable concentration units or guaranteed optimum dosages for every active ingredient.
The different SC ranges illustrate why a dispersant level should be tied to the solids burden and surface characteristics of the actual formulation. A formulation at a lower nominal active loading can still be difficult to disperse if its particles are very fine, strongly aggregating or accompanied by substantial insoluble impurities. Conversely, increasing the dispersant concentration without measuring the resulting rheology may add soluble material without delivering a useful improvement.

Milling and premix preparation: Morwet D 425 Powder is relevant when an aqueous slurry becomes too viscous to circulate efficiently through a mill. Dispersion can reduce the contribution from particle associations and help maintain processability, but the achieved result depends on the chosen solid and liquid phase. A milling trial should compare viscosity, particle-size distribution, temperature rise and energy input at an equivalent final particle size; a fixed percentage reduction in milling time cannot be assigned to the grade independently of those conditions.

Wettable powders: In WP formulations, Morwet D 425 Powder helps the solid particles disperse after the powder is introduced into water. Published guidance places the dispersant at 2–3% w/w and pairs it with a separate wetting agent at 1–2% w/w. The two additives address related but different tasks: water must first penetrate the powder, and the released particles must then remain sufficiently separated to form a usable suspension.
The WP formulator should therefore examine both wetting and subsequent suspensibility. A powder that enters the water quickly can still form aggregates or settle poorly, while a well-stabilized particle surface is of little practical benefit if the dry material remains floating at the surface. Carrier selection, milling, mixing uniformity and the balance between wetter and dispersant all influence the final result.

Water-dispersible granules: Morwet D 425 Powder is also used in WG or WDG formulations, which must break down in water and release a fine suspension. Published development guidance gives 3–5% w/w dispersant with 2–3% w/w of a complementary wetting agent. Granulation conditions influence the required additive balance because compactness, binder behavior and drying history can change water entry and particle release.
WDG evaluation should distinguish granule disintegration from dispersion of the released solids. A granule may lose its visible shape while leaving agglomerates that remain on a wet sieve. The development program should therefore follow disintegration, sieve residue, suspensibility and redispersion after storage, rather than treating the disappearance of intact granules as the sole acceptance criterion.

Water-soluble granule contexts: Product portfolio information also lists WSG among the application areas. This listing does not mean that a dispersant makes an insoluble pesticide molecule water-soluble. Where complete dissolution is required, the developer should demonstrate the dissolution behavior of the entire formulation, including carriers and auxiliaries, and establish whether a dispersion-related additive provides a useful role.
Formulations with different pesticide classes: Published SC guidance includes Morwet D-425 in systems containing imidacloprid and in other examples involving herbicidal or fungicidal actives. These examples establish formulation precedent for the dispersant; they do not establish the present authorization of a particular pesticide, a biological efficacy claim or an agricultural application rate. New formulations require assessment using the intended active grade and applicable product requirements.

Combined active formulations: A suspension containing two different solids may present different adsorption demands from either component alone. A useful development comparison tests each active separately and then the combined system at the intended ratio. Changes in viscosity or separation after combination should be investigated before assuming that a dosage successful for one solid will transfer directly to the mixture.

Dilution into spray water: Morwet D 425 Powder contributes to the transition from a concentrated product to a dilute working suspension. Performance should be checked in the water conditions expected during use, because a stable concentrate can behave differently after dilution. The appropriate observations include ease of dispersion, visible flocculation, sediment formation, redispersion and material retained on the relevant screen or sieve.

Soft and hard water: Technical guidance describes useful dispersibility in both soft and hard water, but this is a formulation-dependent performance statement. Water hardness, dispersant concentration after dilution and the presence of other dissolved ingredients should be considered together. A claim of unlimited hardness tolerance or compatibility with every fertilizer solution would go beyond the available grade information.

Systems needing complementary stabilization: Morwet D 425 Powder can be evaluated alongside a nonionic block copolymer or a suitable polymeric co-dispersant when additional stabilization is needed. This approach combines different contributions to particle stabilization, but the mixture must be checked experimentally. The compatibility of each additive with the active ingredient, rheology modifier, preservative and dilution water remains part of formulation development.

Appearance-sensitive products: The brown color of Morwet D 425 Powder can impart a brownish tone to a formulation. That may be acceptable in many crop protection products but relevant where a pale or white appearance forms part of the product specification. Color should be evaluated at the intended use level and after storage rather than inferred from the appearance of the undiluted raw material.

Other aqueous solid dispersions: The dispersion mechanism of Morwet D 425 Powder provides a basis for exploratory screening in other water-based particle systems. However, this profile does not establish grade-specific suitability for food, pharmaceuticals, cosmetics, drinking-water treatment or every industrial pigment. Ataman Chemicals can be contacted about the intended application so that the required identity, technical information and suitability assessment can be defined before commercial selection.

DESCRIPTION

Morwet D 425 Powder is a commercial polymeric anionic surfactant grade whose principal technical identity is an alkylnaphthalene sulfonate condensate in sodium salt form. It should be described as a condensate distribution rather than a single small molecule with one exact formula. The word “powder” identifies the supplied physical form and distinguishes it from liquid grades containing a substantial aqueous carrier.
The aromatic portion of the Morwet D 425 Powder condensate provides a framework capable of interacting with suitable solid surfaces, while sulfonate groups provide the ionic character associated with water compatibility. The formaldehyde-condensate description identifies the polymer chemistry; it does not establish a numerical free-formaldehyde content in the finished material. A residual monomer or free-formaldehyde requirement needs separate grade documentation and an appropriate analytical result.

The trade designation D 425 is not a molecular weight, particle-size specification or purity percentage. Likewise, the term “anionic active” describes the surface-active content determined for the product and must not be confused with the concentration of a pesticide active ingredient in a formulation. These distinctions are essential when interpreting raw-material specifications and preparing batch calculations.
The concentrated powder format gives formulators control over when and how water is introduced. It also requires powder dosing, dust management and adequate incorporation into the liquid phase. Those operational requirements should be considered alongside dispersing performance when selecting the physical form for an existing production line.

PHYSICAL AND CHEMICAL PROPERTIES

Anionic active content: At least 87% according to the Morwet D 425 Powder specification. This is a minimum specification for the supplied grade and is not a declaration of 100% polymer purity. Portfolio information may present a typical activity of approximately 88%; a typical value should not replace the applicable delivery specification or a batch result.
Moisture: Maximum 4.0% according to the product specification. Moisture contributes to the raw-material mass balance and can influence the consistency of powder handling. The maximum is an acceptance limit, not the measured moisture content of every delivered batch.
Salt content: 7.0–10.0% according to the product specification. This contribution should be considered when assessing total dissolved salts in a formulation. The stated salt parameter should not automatically be relabeled as a specific individual inorganic salt without supporting analytical or compositional documentation.
pH: 7.5–10.0 for a 5% solution in water. The concentration is part of the reported specification and should be retained whenever the number is quoted. This result does not establish the pH of the dry powder or guarantee that a formulation containing a smaller amount will fall within the same range.
Appearance: Powder at 25°C under the product specification; Morwet D 425 Powder is described as brown in safety and portfolio information. No universal raw-material particle-size distribution, flow index or dustiness value is assigned here. Visual appearance alone cannot confirm anionic activity or detect every type of contamination.
Water solubility: Morwet D 425 Powder is soluble according to the grade information. This supports aqueous incorporation, but it does not supply a numerical solubility limit, dissolution time or solution viscosity. Those properties require a defined water temperature, concentration, mixing history and analytical endpoint.
Vegetable-oil compatibility: Portfolio information lists Morwet D 425 Powder as insoluble in vegetable oil. Accordingly, water solubility should not be extrapolated into oil solubility. Selection for a nonaqueous oil dispersion needs separate evidence for the dispersant and the complete carrier system.
Surface tension: Typical value 60 mN/m at 25°C and 0.1% concentration, measured by the Du Noüy method with reference to DIN 53914. The result is an interfacial property under the stated conditions. It does not directly quantify adsorption onto a pesticide crystal or predict the optimum dispersant dosage.
Draves wetting: At least 5 minutes at 25°C and 0.1% concentration. This is a lower-bound test result rather than a precise wetting time. It supports treating Morwet D 425 Powder principally as a dispersant rather than assuming rapid wetting under all conditions.
Ross–Miles foam in deionized water: Typical initial foam height 70 mm, decreasing to 25 mm after 5 minutes, at 25°C and 0.05% concentration. These measurements show that Morwet D 425 Powder can produce foam in the specified test. They do not support describing the powder as nonfoaming.
Ross–Miles foam in Standard Water D: Typical initial height 40 mm and height after 5 minutes 30 mm, at 25°C and 0.05% concentration. The different results demonstrate that test-water composition matters. Standard Water D should remain identified by name when quoting these values; substituting an unspecified process water changes the meaning of the comparison.
Specification status: Activity, moisture, pH, appearance and salt content are listed as product specifications in the consulted technical sheet. Foam, surface tension and wetting results are listed as typical characteristics and are explicitly distinguished from delivery specifications. A purchasing or receiving specification should preserve that distinction.
Thermal and density information: No verified melting point, decomposition temperature, relative density or bulk density is established here. Boiling point is not applicable to the powder, and dynamic or kinematic viscosity is not applicable to the dry form at 20°C. A solution viscosity or bulk density from a different dispersant grade should not be substituted.
Combustible dust: A published grade safety document identifies a dust explosion hazard. This practical safety characteristic applies independently of the absence of a conventional boiling point or the powder’s water solubility. Equipment design requires the current safety information and, where necessary, dust testing representative of the actual process material.

DISPERSION MECHANISM AND STABILITY

Morwet D 425 Powder is described as providing electrostatic stabilization. Adsorption of the anionic condensate onto a suitable particle surface changes the interfacial environment and can help reduce the tendency of particles to associate. The outcome depends on how effectively the dispersant interacts with the particular solid and on the surrounding aqueous composition.
Published adsorption research on imidacloprid particles supports a surface-adsorption role for Morwet D-425. In that specific experimental comparison, adsorption behavior was consistent with physical adsorption, and the adsorbed layer was relatively stable to the temperature changes studied. Those findings support the mechanism for that model solid without establishing a universal adsorption constant, layer thickness or temperature limit for every pesticide.

Dispersion, sedimentation and crystal growth are different processes. Dispersion concerns the separation of particles or agglomerates; sedimentation concerns movement under gravity; crystal growth concerns changes in the solid particles themselves. Improving one of these aspects does not prove that the others have been controlled.
Technical guidance reports crystal-growth benefits in suitable formulations containing Morwet D-425. A developer should nevertheless verify the actual crystal-size distribution and morphology after storage, because an additive that controls aggregation may still require help in a system prone to dissolution and recrystallization. Microscopy and particle-size measurements provide information that a visual sediment check cannot supply alone.
The electrostatic contribution of Morwet D 425 Powder can be combined with steric stabilization from a compatible co-dispersant. Such a combination is an option for evaluation when a single dispersant does not meet the required stability. The correct balance must be demonstrated through the behavior of the complete formulation under storage and use conditions.

FORMULATION AND PROCESSING

For aqueous SC development, introduce Morwet D 425 Powder into the water phase with adequate agitation and incorporate the active ingredient using the selected premix procedure. A separate wetter and an appropriate defoamer may be needed during powder addition and milling. Check that the aqueous phase and solid feed can be mixed uniformly before using higher shear to refine the dispersion.
The order of addition should be established for the particular formulation. A viscosity increase during active addition may reflect inadequate wetting, particle association, concentrated local conditions or interactions with another ingredient. Recording the order, mixing intensity and time makes it possible to identify the cause instead of correcting every problem by adding more dispersant.

Mill to a defined particle-size endpoint and compare samples at a controlled temperature. A thinner mill base can improve circulation, but viscosity measured immediately after a hot milling pass may not represent the final cooled product. Both the process sample and the completed formulation should therefore be evaluated under stated measurement conditions.
Rheology modifiers are normally selected for a different function from the primary dispersant. Their contribution may be needed to limit settling while preserving pouring and pumping behavior. The product should be checked for redispersion after standing, since low initial viscosity and easy milling do not by themselves establish acceptable long-term sediment behavior.

For dry blends, demonstrate the distribution of Morwet D 425 Powder through the powder mixture before granulation or final packing. In WG development, retain records of the water addition, binder system, granulation conditions and drying history. A successful laboratory blend may change when granule density or drying conditions change during scale-up.
Foam control should be evaluated during the actual mixing and dilution sequence. A defoamer that performs during milling may behave differently after storage or after a large dilution in hard water. The selection should therefore consider both manufacturing performance and the final working suspension.
Morwet D 425 Powder is anionic, so combinations with cationic ingredients require particular compatibility testing. The presence of other surfactants, salts, acids or preservatives can also change the behavior of a dispersion. Compatibility should be assessed at intended concentrations rather than inferred from the fact that each ingredient is individually water-soluble.

CONCENTRATION AND MASS BALANCE

Calculate additions on the basis specified in the formulation and the raw-material documentation. Product percentage, anionic active percentage, pesticide active percentage and total solids are different quantities. Converting between them requires the relevant batch composition and cannot be achieved by changing the label on the same number.
As an arithmetic example only, adding 2.00 kg of Morwet D 425 Powder to a 100.00 kg final batch gives a 2.00% w/w product addition. Using the published specification limits, that quantity contributes at least 1.74 kg of anionic active material, between 0.14 and 0.20 kg of the specified salt fraction, and no more than 0.08 kg of moisture. This example is a mass-balance illustration, not a recommendation for an unspecified pesticide formulation.
The activity minimum and moisture maximum are independent acceptance limits. They should not all be assumed to occur simultaneously in a particular batch, and the available parameters should not be forced into a complete compositional analysis. Use the lot-specific results where the formulation requires tighter control.
For a direct calculation using measured activity, product mass equals the required anionic active mass divided by the activity expressed as a decimal. Even when an activity-based conversion is correct mathematically, a replacement dispersant may introduce different salts, water and surface properties. Formulation equivalence still requires practical testing.

QUALITY AND PERFORMANCE EVALUATION

Receiving control for Morwet D 425 Powder should establish the grade identity and the relevant batch documentation. Check appearance, packaging condition, traceability and conformity with the agreed specification. Where pH, moisture or activity is measured internally, use a defined method and sample preparation so that internal and reported results can be compared meaningfully.
Performance control should represent the intended application. An SC may require viscosity at specified shear conditions, particle-size distribution, wet-sieve residue, sedimentation and redispersion assessments. A WP or WG additionally needs evaluation of wetting and release into water, with suitable checks after storage.
Inspect both fresh and aged samples. Storage observations should include changes in flow behavior, separation, hard sediment, coarse particles, color and dispersion after dilution. A single measurement immediately after manufacture can miss changes that develop during standing or temperature exposure.

Accelerated storage is useful for comparison when a suitable method is selected, but it does not create an automatic mathematical conversion into a commercial shelf life. Stability decisions should account for the intended packaging, chemical stability of the pesticide active and the required physical properties. The raw dispersant’s storage guidance is also distinct from the storage life of a finished pesticide.
Ataman Chemicals can be contacted to discuss documentation and an evaluation sample for the intended system. A technically useful inquiry identifies the formulation type, active loading, target water conditions and the main performance problem. This allows discussion to focus on a defined application without assuming that one dispersant grade solves every formulation difficulty.

STARTING FORMULATION APPROACHES FOR MORWET D 425 POWDER

The following examples illustrate how Morwet D 425 Powder can be evaluated during formulation and process development. They are preliminary laboratory screening approaches, not validated commercial recipes, production instructions or finished formulations with established regulatory compliance.

Morwet D 425 Powder, identified in technical documentation as Morwet D-425 Powder, is an anionic sodium salt of naphthalene sulfonate condensate. D-425 dispersant, NSC dispersant and naphthalene-sulfonate condensate are useful descriptive terms. The product is used as a primary dispersant in aqueous suspensions and dry formulations, where particle wetting, dispersion, foam and suspension structure must be assessed together.

The Morwet D 425 Powder data sheet specifies anionic active content of at least 87%. This is a specification limit, not an exact assay for every batch. Use the actual certificate of analysis when calculating active-dispersant additions or comparing grades. Supplied powder also contributes salt, moisture and other non-active material; powder and liquid grades require separate dosing calculations.

Unless stated otherwise, percentages are by mass of the supplied ingredients in the stated formulation. Examples 1 and 2 total 100% as charged. Example 3 totals 100% of the powder blend before temporary granulation water is added. Technical-material loading is not automatically the same as active-ingredient concentration; document its assay separately.

The numerical levels are illustrative starting points. Each selected technical material requires compatibility, processing, physical-performance and storage testing. For crop-protection products, assess biological performance, permitted co-formulants and the applicable registration requirements independently. The examples do not specify a field application rate or establish approval of a finished product.

EXAMPLE 1: MORWET D 425 POWDER DOSAGE SCREENING IN AN AQUEOUS SUSPENSION CONCENTRATE

Objective: Determine how Morwet D 425 Powder loading affects premix viscosity, milling response, particle stability, settling and redispersibility at a fixed technical-solid concentration.

Starting components:

Selected poorly water-soluble technical material: approximately 40.00%, held constant

Morwet D 425 Powder: approximately 2.00%, 2.50% and 3.00%

Compatible nonionic wetting agent: approximately 1.00% as supplied, held constant

Propylene glycol: approximately 5.00%, held constant

Xanthan gum: approximately 0.25% on a dry-gum basis, held constant

Compatible antifoam: approximately 0.20% as supplied, held constant

Compatible preservation package: illustrative 0.05% as supplied, only where appropriate to its approved use conditions

Demineralized water: respectively 51.50%, 51.00% and 50.50%

Technical-material batch, milling equipment, dispersion input, temperature and target particle distribution: held constant

Using 87% activity solely as an illustrative calculation basis, these Morwet D 425 Powder additions correspond to 1.74%, 2.175% and 2.61% active dispersant in the complete suspension. Recalculate using the actual batch assay. The required dose depends on the technical solid's surface properties and the complete formulation.

Application approach:

Verify technical-material identity, assay, moisture, solubility and stability under the proposed processing conditions.
Prepare the aqueous phase and incorporate the measured Morwet D 425 Powder quantity under controlled agitation.
Introduce the compatible wetting components and technical solid using a repeatable charging sequence.
Assess initial wetting, viscosity and foam before milling.
Mill each trial under matched conditions while monitoring temperature and particle-size development.
Introduce hydrated xanthan gum, antifoam and the qualified preservation package at the approved stages.
Verify final mass, pH, particle distribution and viscosity under defined measurement conditions.
Compare sedimentation, compacted sediment, redispersibility and dilution behavior.
Recheck properties after 7 days and after any separately qualified storage study, then repeat the most balanced dose.

Morwet D 425 Powder can affect particle stabilization without providing sufficient suspension structure. Evaluate rheology, particle growth where relevant and dilution stability separately. Do not infer long-term stability solely from a low initial milling viscosity.

Control powder and technical-solid exposure with appropriate containment or extraction. Use eye protection and suitable gloves, review the current safety data sheets and manage formulation residues and cleaning liquids according to their complete composition.

EXAMPLE 2: WETTING-AGENT BALANCE WITH MORWET D 425 POWDER IN A WETTABLE POWDER

Objective: Compare wetting, dispersion, suspensibility and foam when the wetting-agent concentration changes at a fixed D-425 dispersant level.

Starting components:

Selected dry technical material: approximately 70.00%, held constant

Morwet D 425 Powder: approximately 3.00%, held constant

Compatible powdered wetting agent: approximately 1.00%, 1.50% and 2.00%

Compatible powdered antifoam: approximately 0.25%, held constant

Compatible silica flow aid: approximately 0.50%, held constant

Kaolin carrier: respectively 25.25%, 24.75% and 24.25%

Technical-material particle distribution, carrier batch, blending sequence and test-water composition: held constant

Morwet D 425 Powder remains the primary dispersant while the separate wetting agent is screened. Changing the kaolin balance also changes carrier contribution slightly; assess the full formulation. Confirm final moisture and active-substance assay rather than relying only on charge weights.

Application approach:

Verify compatibility of the technical material, D-425 dispersant, wetting agent and carrier.
Prepare matched powder premixes using controlled, contained handling.
Apply the qualified blending and size-reduction sequence while limiting heating, dust and cross-contamination.
Check blend uniformity, moisture, flow and particle distribution.
Introduce equal sample quantities into the same defined water using a repeatable method.
Record wetting time, floating material, dispersion, foam, suspensibility and wet-sieve residue.
Repeat selected comparisons in separately defined soft and hard waters, documenting hardness, pH and relevant ionic composition.
Assess caking and changes in aqueous performance after controlled storage.
Select the wetting-agent level that balances wetting speed, dispersion quality and manageable foam.

Rapid wetting does not guarantee good suspension stability, and more wetting agent can increase foam or alter storage behavior. If the Morwet D 425 Powder dose is later changed, repeat the balance study rather than assuming the original wetting-agent optimum remains valid.

Provide dust extraction and eye protection during weighing and blending. Select further personal protection from the full formulation's exposure assessment, and keep contaminated equipment and powder residues segregated from unrelated production.

EXAMPLE 3: MORWET D 425 POWDER LOADING AND STORAGE EVALUATION IN WATER-DISPERSIBLE GRANULES

Objective: Examine the effect of D-425 loading on granulation, granule durability, disintegration, suspensibility and retention of performance after storage.

Starting components:

Selected compatible dry technical material: approximately 70.00%, held constant

Morwet D 425 Powder: approximately 3.00%, 4.00% and 5.00%

Compatible powdered wetting agent: approximately 2.50%, held constant

Compatible water-soluble granulation binder: approximately 2.00%, held constant using a qualified binder grade

Compatible powdered antifoam: approximately 0.25%, held constant

Kaolin carrier: respectively 22.25%, 21.25% and 20.25%

Temporary process water: added according to the qualified granulation method and recorded separately from the powder-blend percentages

Granulation equipment, target size fraction, drying endpoint, packaging and storage protocol: held constant as far as practical

The listed ingredients total 100% before process-water addition. Determine the final granule composition, assay and residual moisture after drying. Morwet D 425 Powder and the other ingredients can change water demand, so the required process-water quantity must be established experimentally.

Application approach:

Check technical-material compatibility, additive specifications and the permitted drying conditions.
Prepare uniform dry blends using the same ingredient lots.
Introduce process water by a controlled procedure and record the amount required to reach the defined granulation condition.
Form granules using qualified equipment and collect matched size fractions.
Dry within the complete formulation's approved temperature and moisture limits.
Measure granule-size distribution, residual moisture, strength, attrition and dust generation.
Compare wetting, disintegration, dispersion, suspensibility, foam and wet-sieve residue in defined application waters.
Repeat the physical tests after a storage program appropriate to the technical material and proposed packaging.
Confirm the most balanced Morwet D 425 Powder level before separately optimizing binder or granulation conditions.

Granule strength and aqueous breakdown must be assessed together. A product that withstands handling may still disperse poorly after storage. Rebalance and retest the formulation if the binder, carrier, wetting agent or technical-solid grade changes.

Review the current grade-specific safety data and control eye exposure, airborne dust and combustible-dust risks. Maintain suitable controls during blending, granulation, drying and screening, and dispose of technical-material-containing waste according to the complete composition and applicable requirements.

FIRST AID FOR MORWET D 425 POWDER

Morwet D 425 Powder eye contact: Immediately rinse the eyes thoroughly with clean water, keeping the eyelids open. Remove contact lenses if present and easy to remove, continue rinsing, and obtain medical attention. Avoid rubbing the affected eyes.
Morwet D 425 Powder skin contact: Remove contaminated clothing and shoes and rinse the affected skin with plenty of water. Seek medical advice if irritation develops or persists, and clean contaminated clothing before reuse.
Morwet D 425 Powder inhalation: Move the affected person to fresh air and keep them comfortable and at rest. Obtain medical attention if respiratory symptoms occur or persist, and seek urgent assistance for breathing difficulty.
Morwet D 425 Powder ingestion: Rinse the mouth and obtain medical advice. Never give anything by mouth to an unconscious person. Provide the product identification and current safety data sheet to the attending healthcare professional.

HANDLING AND STORAGE OF MORWET D 425 POWDER

Handling Morwet D 425 Powder: Minimize airborne dust during bag opening, transfer and mixing, and use appropriate local exhaust ventilation at dust-generating points. Prevent contact with eyes and avoid breathing powder. Keep suitable eyewash facilities accessible and follow the current regional safety data sheet for the supplied grade.
Personal protection for Morwet D 425 Powder: Use suitable eye protection, protective clothing and chemically appropriate gloves selected for the work. Respiratory protection should follow the exposure assessment, local requirements and current product guidance. Engineering control of dust remains part of safe handling even when personal protective equipment is used.
Dust control for Morwet D 425 Powder: Prevent powder deposits from accumulating on floors, ledges and equipment, and keep ignition sources away from dust-generating operations. Use cleaning methods and equipment suitable for combustible dust. Avoid practices that suspend settled powder into the air.

Storage of Morwet D 425 Powder: Keep the material dry in tightly closed original packaging and protect it from moisture and contamination. Published grade documentation includes a three-year storage statement from manufacture; applicability should be confirmed against the supplied lot, packaging condition and current guidance. This statement is not a shelf-life claim for any finished formulation.
Opened Morwet D 425 Powder packaging: Close promptly after removing material and retain identification and batch traceability. Investigate wet or damaged packs before use, because visual drying or breaking up lumps does not demonstrate restoration of the original specification.

FIRE, SPILL AND DISPOSAL INFORMATION

Morwet D 425 Powder presents a combustible dust concern, and a published grade safety document also identifies serious eye irritation, H319. Classification and protective measures for a delivery should be taken from its current regional safety data sheet. Water solubility and a nonvolatile physical form do not remove the need for eye protection or dust control.
For a spill, restrict access and recover powder without producing a dust cloud using suitable equipment. Place recovered material in an appropriate closed, labeled container. Do not wash spilled product into drains or surface water.
In a surrounding fire, use extinguishing measures appropriate to the incident and prevent dust accumulation from contributing to secondary events. Combustion can produce carbon oxides, sulfur oxides and metal oxides. Firefighters require appropriate protective equipment and breathing apparatus.
Keep residues, contaminated packaging and collected wash water within the applicable waste-management system. Water solubility does not justify sewer disposal. Transport status and waste classification should be confirmed using the current documentation and the applicable route and jurisdiction.

TECHNICAL SUMMARY

Morwet D 425 Powder is a concentrated anionic dispersant consisting principally of a sodium alkylnaphthalene sulfonate formaldehyde condensate. The commercial material is a polymeric distribution, so it should not be assigned a small-molecule formula or one exact molecular weight. A published grade safety document identifies CAS 68425-94-5; the identity and current classification should be checked against the documentation accompanying the supplied material.
Morwet D 425 Powder is intended primarily for particle dispersion in crop protection formulations. Its aromatic framework and sulfonate functionality support adsorption at suitable solid–water interfaces and an electrostatic contribution to stabilization. This can assist formation of a manageable premix and support particle separation during milling. The degree of improvement depends on the active ingredient, particle surface, formulation composition and processing conditions.

The Morwet D 425 Powder specification gives anionic active content of at least 87%, moisture no greater than 4.0%, and salt content of 7.0–10.0%. The specified pH is 7.5–10.0 for a 5% solution in water. These parameters describe the supplied raw material; they do not establish the final formulation pH, pesticide active content or complete compositional balance. Brown appearance can also influence the color of a finished product.
Typical interfacial measurements distinguish dispersing behavior from rapid wetting. Surface tension is 60 mN/m at 25°C and 0.1%, while the Draves wetting result is at least five minutes under the same temperature and concentration conditions. Ross–Miles foam results depend on test water and elapsed time. The grade can therefore require a complementary wetter and suitable foam control, rather than being treated as a complete wetting and defoaming package.
Documented development guidance covers aqueous suspension concentrates, wettable powders and water-dispersible granules. Starting dispersant ranges include 2–3% w/w for a 480 g/L SC, 3–5% for a 720 g/L SC, 2–3% for WP and 3–5% for WDG. These are formulation development ranges, not pesticide application rates or guaranteed optimum dosages. Granulation, milling, carrier selection and the chosen wetting agent can change the required balance.

Successful evaluation separates several aspects of stability. Low premix viscosity does not prove resistance to sedimentation, and reduced aggregation does not establish complete control of crystal growth. The concentrate and its working dilution should be examined independently, using relevant measurements of particle size, rheology, suspensibility, sieve residue and redispersion. Water hardness, other electrolytes and storage conditions should be represented in the assessment.
Morwet D 425 Powder is water-soluble, but no quantitative saturation limit, verified bulk density or solution-viscosity specification is established here. Its solubility should not be extrapolated to vegetable oil or to dissolution of an insoluble active ingredient. Applications beyond the documented formulation contexts require their own suitability assessment and supporting technical evidence.

Handling requires protection against eye contact and control of airborne and accumulated dust. Store the material dry in closed, identified packaging and apply the current grade safety instructions. Ataman Chemicals can be contacted about the intended formulation, technical documentation and evaluation requirements. Commercial selection should follow demonstrated performance in the actual system, with suitable batch traceability and an agreed raw-material specification. A useful qualification program compares fresh material and stored samples under the same analytical conditions, then confirms that any change in dispersant dosage remains compatible with production and dilution requirements.

FREQUENTLY ASKED QUESTIONS

What is Morwet D 425 Powder?
Morwet D 425 Powder is a powdered anionic dispersant based on a sodium alkylnaphthalene sulfonate condensate, used primarily in crop protection formulations.

Is Morwet D 425 Powder a single molecule?
No. Morwet D 425 Powder is a commercial polymeric condensate grade and is not adequately described by one small-molecule formula or one exact molecular weight.

Which CAS number is supported by grade safety information?
A published grade safety data sheet identifies CAS 68425-94-5. Confirm the identity against the current documentation for the material supplied.

What is the minimum anionic active content?
The consulted Morwet D 425 Powder specification states at least 87%. This refers to the dispersant’s anionic activity, not pesticide active content.

How much moisture and salt can the powder contain?
The Morwet D 425 Powder specification gives moisture of no more than 4.0% and salt content of 7.0–10.0%; individual batch results may fall within those limits.

What is the specified pH?
The range is 7.5–10.0 for a 5% solution in water. The solution concentration must be retained when quoting or checking this value.

Does Morwet D 425 Powder dissolve in water?
Grade information describes Morwet D 425 Powder as water-soluble, but a numerical saturation concentration and a universal dissolution time are not established here.

Is it a fast wetting agent?
The typical Draves result is at least five minutes at 25°C and 0.1%. A separate wetting agent may therefore be needed for rapid powder incorporation.

Is Morwet D 425 Powder nonfoaming?
No such claim is supported. Published Ross–Miles measurements show foam, with results depending on the test water and observation time.

Where is Morwet D 425 Powder used?
The principal documented applications of Morwet D 425 Powder include suspension concentrates, wettable powders and water-dispersible granules; portfolio information also lists water-soluble granule applications.

What dosage should be used in an SC?
Published starting guidance gives 2–3% w/w for a 480 g/L SC and 3–5% for a 720 g/L SC. Optimize through trials with the actual active ingredient and complete formulation.

What dosage guidance is available for WP and WDG?
Published starting ranges are 2–3% w/w dispersant for WP and 3–5% for WDG, normally with an independently selected complementary wetter.

Does Morwet D 425 Powder prevent all sedimentation and crystal growth?
No universal guarantee is justified. Aggregation, sedimentation and crystal growth require separate evaluation, and the complete formulation may need additional stabilization.

Can Morwet D 425 Powder be used in every hard-water system?
Technical guidance describes useful soft- and hard-water performance, but the intended dilution, hardness and other dissolved ingredients must be tested together.

Are powder and liquid dispersant grades interchangeable by weight?
No. Their activity, water contribution and other properties can differ; a replacement requires a documented mass balance and formulation performance checks.

How can Ataman Chemicals assist with selection?
Contact Ataman Chemicals with the intended formulation type, active loading, water conditions and target performance so that the relevant technical documentation and evaluation requirements can be discussed.

CONTACT ATAMAN CHEMICALS

For Morwet D 425 Powder inquiries, contact Ataman Chemicals with the intended application and required documentation. Suitability, packaging and commercial details can be discussed for the specific inquiry without assuming a universal formulation recommendation.
Ataman Chemicals
Phone: +90 216 577 10 10
Email: info@atamankimya.com