PURANOL D 204

Puranol D 204 is used in polyurethane elastomers, adhesives, coatings, waterproof coatings, chemical grouting materials, shoe soles, and non-cellular polyurethane applications such as coating, adhesives, sealants and elastomers.
Puranol D 204 is used in non-cellular polyurethane applications.
Puranol D 204 is recommended for use in elastomers.

CAS number “25322-69-4
EC number (EINECS): No reliable EC / EINECS number is publicly available for Puranol D 204 — it does not appear in standard regulatory chemical-substance databases.
Molecular formula: Not provided, because Puranol D 204 is a polyether polyol mixture, not a single defined molecule. 
Molecular weight: approximately 400 g/mol, according to the Knowde technical data. 

SYNONYMS:
Polyether polyol, CASE polyether polyol, Polyol‑based monomer, Puranol D204, Polyether polyol (Puranol D 204)

Puranol D 204 is a polyol.
Puranol D 204 is considered to have relatively low toxicity when used correctly.
Like most neutral polyether polyols, Puranol D 204 behaves more like a mild surfactant-type liquid rather than a dangerous industrial chemical.

As with all polyols, Puranol D 204 must be stored in tightly sealed containers to prevent moisture absorption, which can interfere with polyurethane reactions.
Puranol D 204 should also be kept away from strong heat sources and incompatible reactive chemicals.

In terms of handling and storage, Puranol D 204 should be protected from moisture because polyether polyols are slightly hygroscopic.
Its low viscosity makes Puranol D 204 easy to pump, measure, and blend with other polyols or additives.
Puranol D 204 is not classified as a dangerous substance under normal industrial usage conditions, though official classification varies because it lacks a formal regulatory identity.

Even though Puranol D 204 does not have classical synonyms like pure compounds do, it is sometimes generically referred to as a polyether polyol, polyurethane polyol, or di-functional polyol.
These descriptors are not synonyms of Puranol D 204 name but refer to its functional or chemical category.

Because Puranol D 204’s composition is proprietary, detailed molecular structure, exact monomer ratio, or precise chain-length distribution are not publicly disclosed by the manufacturer.
Puranol D 204 is synthesized with propylene glycol, glycerin, and epoxide.

Puranol D 204 is a polyether polyol.
Puranol D 204 is synthesized from propylene glycol, glycerin, and epoxide.
Puranol D 204 belongs to the CASE (Coatings, Adhesives, Sealants, Elastomers) polyol family.

As a polyether polyol, Puranol D 204 provides reactive hydroxyl groups that can react with isocyanates (–NCO) to build polyurethane networks.
The high hydroxyl value indicates Puranol D 204 has a relatively high density of –OH groups, which means it can contribute to crosslink density or provide good reactivity in PU formulations.

Puranol D 204 is a liquid polyether polyol belonging to the Puranol product family, widely used in polyurethane systems.
Puranol D 204 is produced through the polymerization of propylene oxide using starter molecules such as glycerin, propylene glycol, or other low-molecular-weight glycols.

As a result, Puranol D 204 is not a single, well-defined chemical compound but a mixture of polyether chains of different lengths, giving it characteristic average molecular parameters such as hydroxyl value and viscosity.
Because Puranol D 204 is a trade product rather than a pure substance, it does not have a unique CAS number, EC number, or IUPAC name, which is why it does not appear in regulatory chemical identity databases like ECHA or PubChem.

USES and APPLICATIONS of PURANOL D 204:
Puranol D 204 is used in polyurethane elastomers, adhesives, coatings, waterproof coatings, chemical grouting materials, shoe soles, and non-cellular polyurethane applications such as coating, adhesives, sealants and elastomers.
Puranol D 204 is used in non-cellular polyurethane applications.

Puranol D 204 is recommended for use in elastomers.
Puranol D 204 is used in non-cellular polyurethane applications.
Overall, Puranol D 204 is valued in polyurethane industries for its versatility, processability, and compatibility with a wide range of isocyanates and additives.

Its performance characteristics make Puranol D 204 an essential intermediate for producing durable, flexible, and chemically resistant polyurethane materials used across construction, automotive, industrial coatings, footwear, and general manufacturing sectors.
Puranol D 204 is used in polyurethane elastomers, adhesives, coatings, waterproof coatings, chemical grouting materials, shoe soles, and non-cellular polyurethane applications such as coating, adhesives, sealants and elastomers.

Puranol D 204 is used primarily in non-cellular polyurethane (PU) applications: elastomers, adhesives, coatings, sealants, waterproof coatings, chemical grouting, shoe soles, etc.
Because of its low viscosity, Puranol D 204's relatively easy to handle, mix, and process in PU systems.

Its functionality of 2 (di-functional) makes Puranol D 204 suitable for linear or lightly branched PU structures (e.g., elastomers) rather than highly crosslinked foams.
Low acid and metal content make Puranol D 204 more stable and likely to produce PU with fewer side reactions or unwanted coloration / degradation.

In polyurethane chemistry, Puranol D 204 is used for its balanced reactivity, low viscosity, and di-functional structure.
Puranol D 204's hydroxyl value, typically around 270–290 mg KOH/g, indicates that it is a relatively reactive polyol capable of forming strong bonds with isocyanates.

The average molecular weight of around 400 g/mol makes Puranol D 204 suitable for creating flexible, durable polyurethane elastomers and coatings.
Puranol D 204'low acidity and very low water content ensure good stability, reduce unwanted side reactions, and prevent foaming or gas formation during polyurethane synthesis.

Puranol D 204 is frequently selected for CASE applications—coatings, adhesives, sealants, and elastomers—because it enhances mechanical strength, flexibility, and adhesion performance.
In waterproofing and protective coating systems, Puranol D 204's polyether structure helps increase hydrolytic stability and resistance to environmental degradation.

In adhesive and sealant formulations, Puranol D 204's di-functional character supports controlled curing rates and offers a predictable viscosity profile, improving workability and leveling.
In elastomer production, Puranol D 204 contributes to producing materials with good tensile strength, elongation, and resilience.

PHYSICAL and CHEMICAL PROPERTIES of PURANOL D 204:
Hydroxyl value (OH number): 270 – 290 mg KOH/g. 
Viscosity: ~ 50 – 100 cP (at 25 °C) according to Knowde. 
Molecular weight (average): ~ 400 g/mol. 
Functionality: 2 (i.e., it's a diol polyol). 
Acid value: very low (max ~0.08 mg KOH/g) per Knowde. 
Color (APHA): ≤ 50 (APHA scale) – meaning relatively low color / not very yellow. 
Water content: very low, ≤ 0.05% w/w according to Knowde. 
Potassium (K⁺) content: max ~5 ppm. 

Density / Physical State: It's a liquid polyol (standard case polyol) — typically clear or slightly colored; not a solid.
CAS number “25322-69-4” for “Puranol D204 (polypropylene glycol with molecular weight 400)”. 
According to a technical brochure, the approximate molecular weight (average) is ~ 400 g/mol (for this product series) and functionality = 2
CAS number “25322-69-4
EC number (EINECS): No reliable EC / EINECS number is publicly available for Puranol D 204 — it does not appear in standard regulatory chemical-substance databases.
Molecular formula: Not provided, because Puranol D 204 is a polyether polyol mixture, not a single defined molecule. 
Average molecular weight: approximately 400 g/mol, according to the Knowde technical data. 

FIRST AID MEASURES of PURANOL D 204:
-Description of first-aid measures
*General advice:
Show this material safety data sheet to the doctor in attendance.
*If inhaled:
After inhalation: 
Fresh air.
*In case of skin contact: 
Take off immediately all contaminated clothing. 
Rinse skin with
water/ shower.
*In case of eye contact:
After eye contact: 
Rinse out with plenty of water. 
Call in ophthalmologist. 
Remove contact lenses.
*If swallowed:
After swallowing: 
Immediately make victim drink water (two glasses at most). 
Consult a physician.
-Indication of any immediate medical attention and special treatment needed.
No data available

ACCIDENTAL RELEASE MEASURES of PURANOL D 204:
-Environmental precautions:
Do not let product enter drains.
-Methods and materials for containment and cleaning up:
Cover drains. 
Collect, bind, and pump off spills. 
Observe possible material restrictions. 
Take up dry. 
Dispose of properly. 
Clean up affected area.

FIRE FIGHTING MEASURES of PURANOL D 204:
-Extinguishing media:
*Suitable extinguishing media:
Carbon dioxide (CO2) 
Foam 
Dry powder
*Unsuitable extinguishing media:
For this substance/mixture no limitations of extinguishing agents are given.
-Further information:
Prevent fire extinguishing water from contaminating surface water or the ground water system.

EXPOSURE CONTROLS/PERSONAL PROTECTION of PURANOL D 204:
-Control parameters:
--Ingredients with workplace control parameters:
-Exposure controls:
--Personal protective equipment:
*Eye/face protection:
Use equipment for eye protection. 
Safety glasses
*Body Protection:
protective clothing
*Respiratory protection:
Recommended Filter type: Filter A 
-Control of environmental exposure:
Do not let product enter drains.

HANDLING and STORAGE of PURANOL D 204:
-Conditions for safe storage, including any incompatibilities:
*Storage conditions:
Tightly closed. 
Dry.

STABILITY and REACTIVITY of PURANOL D 204:
-Chemical stability:
The product is chemically stable under standard ambient conditions (room temperature).
-Possibility of hazardous reactions:
No data available