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PHOSPHONOBUTANETRICARBOXYLIC ACID = PBTC
CAS Number: 37971-36-1
European Community (EC) Number: 253-733-5
Molecular Formula: C7H11O9P
IUPAC Name: 2-phosphonobutane-1,2,4-tricarboxylic acid
DESCRIPTION:
PBTC is a low phosphorus chemical containing organophosphonate, which is known to be a highly effective threshold scale inhibitor.
In other words, at very low (ppm level) levels, sub-stoichiometric concentrations calculated on hardness of water, PBTC acts as excellent scale inhibitor for carbonates, sulfates and phosphates.
PBTC has good chelating ability for heavy metals.
PBTC is a weaker complexing agent for metals than EDTA. Hence, it eliminates the remobilization of heavy metals from sediments.
PBTC also has excellent tolerance towards chlorine and hypo-chlorites in the presence of bromine where most of the other phosphonates degrade extremely fast.
PBTC’s excellent thermal stability at various pH ranges, enables it to remain effective even at high pH levels and temperatures.
Additionally, PBTC has the dispersion property.
PBTC’s anions get adsorbed by inorganic particles in the water giving it the dispersion ability.
Lastly, PBTC is a good corrosion inhibitor for carbon steel.
Hence, PBTC is part of all organic water treatment programs.
Applications of PBTC:
• Industrial cooling water treatment.
• Industrial and institutional cleaners (I & I formulations)
• Disinfectants
• Liquid dishwashing and detergents
• Metal surface treatment
• Sequestering agent in textile auxiliaries
• Hypochlorite stabilization
Phosphonates derived from phosphorous (phosphonic) acid are employed in the applications of scale Inhibition, sequestration, dispersion and corrosion inhibition in addition to the main applications of agricultural chemicals such as fertilizers, pesticides, and soil conditioners.
Phosphonates offer a wide range of sequestrants to control metal ions in aqueous systems.
By forming stable water soluble complexes with multivalent metal ions, phosphonates prevent undesired interaction by blocking normal reactivity of metal ions.
This ability contributes to function as threshold industrial water treatment and metal treatment processes (antiscalants, corrosion inhibitors, chelants, sludge conditioners, pulp bleachings, deflocculants, dispersants, metal cleaners, electroplating and crystal growth modifiers). Phosphonates are also used in manufacturing detergents, cosmetics and personal care products for special functions such as low levels iron control, stain removal, bleach stabilization, peroxide stabilization and anti-encrustation.
Phosphonates existing in various compounds as acids or salts are marketed in the form of concentrated solutions.
PBTC has three carboxy groups in one molecule.
This multifunctional carboxylic acid provides covalently linked structure with hydroxy group. Carboxylic acids form amide derivatives.
PBTC is a raw material to produce aromatic polyimide resins having high resistance to thermal stresses.
PBTC is a metal chelator.
PBTC is used as a corrosion inhibitor and a metal-cleaning composition.
PBTC is used as a chemical intermediate.
Its derivatives, acyl halides, anhydrides, esters, amides and nitriles, are used in making target products such as flavoring agents, pesticides, cosmetic ingredients, dyes, textile treatment agents, fungicides, and pharmaceuticals through further reactions of substitution, catalytic reduction, metal hydride reduction, diborane reduction, keto formation with organometallic reagents, electrophile bonding at oxygen, and Claisen condensation on carboxylic group.
Chemical and Physical Properties of PHOSPHONOBUTANETRICARBOXYLIC ACID
Molecular Weight: 270.13
XLogP3-AA: -2.8
Hydrogen Bond Donor Count: 5
Hydrogen Bond Acceptor Count: 9
Rotatable Bond Count: 7
Exact Mass: 270.01406892
Monoisotopic Mass: 270.01406892
Topological Polar Surface Area: 169 Ų
Heavy Atom Count: 17
Formal Charge: 0
Complexity: 383
Isotope Atom Count: 0
Defined Atom Stereocenter Count: 0
Undefined Atom Stereocenter Count: 1
Defined Bond Stereocenter Count: 0
Undefined Bond Stereocenter Count: 0
Covalently-Bonded Unit Count: 1
Compound Is Canonicalized: Yes
Experimental Properties of PHOSPHONOBUTANETRICARBOXYLIC ACID
Physical Description: DryPowder; Liquid
Appearance: Clear colorless to pale yellow aqueous solution
Physical State: Aqueous Solution
Active Content: 50%(as Acid)
Specific Gravity @ 25℃: 1.28
pH of 1% Solution @ 25℃: <2
Iron (Fe) PPM: <10
Boiling Point: > 212°F (100°C)
Flash Point: > 212°F (100°C)
Solubility in Water: Miscible
Odor: Slight
Appearance: 2-Phosphonobutane-1,2,4-Tricarboxylic Acid or PBTCA; PBTC is pale yellow liquid
pH: Acidic < 2
Vapor Pressure: ~20 MBAR at 20°C
Boiling Point: 101°C to 103°C
Freezing Point: -15°C
Solubility: Soluble in water in all proportions
Density: 1.30 g/cc @ 20ºC
Specific Gravity: 1.25-1.35
Viscosity: 15-25 CST @ 25ºC mm2/sec
USES OF PHOSPHONOBUTANETRICARBOXYLIC ACID:
• anticorrosive
• buffering
• chelating
• chelating agent
PHOSPHONOBUTANETRICARBOXYLIC ACID is used as additive to cooling water (anti-scaling agent) and to industrial cleaning/bleaching agents (food processing and textile industries).
Industry Uses of PHOSPHONOBUTANETRICARBOXYLIC ACID:
• Corrosion inhibitors and anti-scaling agents
• Photosensitive chemicals
• Processing aids, not otherwise listed
• Surface active agents
Consumer Uses of PHOSPHONOBUTANETRICARBOXYLIC ACID:
• Cleaning and furnishing care products
• Laundry and dishwashing products
• Water treatment products
Industry Processing Sectors of PHOSPHONOBUTANETRICARBOXYLIC ACID:
• All other basic organic chemical manufacturing
• All other chemical product and preparation manufacturing
• Miscellaneous manufacturing
• Oil and gas drilling, extraction, and support activities
• Soap, cleaning compound, and toilet preparation manufacturing
• Utilities
• Wholesale and retail trade
PHOSPHONOBUTANETRICARBOXYLIC ACID is used as a scale inhibitor in industrial cooling water and water treatment applications and as an ingredient in industrial cleaning agents.
SAFETY INFORMATION ABOUT PHOSPHONOBUTANETRICARBOXYLIC ACID:
Hazard statements:
H303 May be harmful if swallowed.
H314 Cause severe skin burns and eye damage!
H318 Cause serious eye damage!
H333 May be harmful if inhaled.
Precautionary statements:
P260: Do not breathe dust/fume/gas/mist/vapors/spray.
P261: Avoid breathing dust/fume/gas/mist/vapors/spray.
P264: Wash with plenty of water and soap thoroughly after handling.
P270: Do not eat, drink or smoke when using this product.
P273:: Avoid release to the environment.
P280: Wear protective gloves/protective clothing/eye protection/face protection.
P281: Wear protective equipment for hands, eyes, face and respiratory tract.
P301+330+331: IF SWALLOWED: Rinse mouth.
Do NOT induce vomiting.
P301+312: IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell.
P302+P352: IF ON SKIN: Wash with plenty of soap and water.
P303+361+353: IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing.
Rinse skin with water/shower.
P304+P340: IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing.
P304+312: IF INHALED: Call a POISON CENTER or doctor/physician if you feel unwell.
P305+P351+P338: IF IN EYES: Rinse cautiously with water for several minutes.
Remove contact lenses, if present and easy to do.
Continue rinsing.
P312: Call a POISON CENTER or doctor/physician if you feel unwell.
P362: Take off contaminated clothing and wash before reuse.
P405: Store locked up.
P501: Dispose of contents/container in accordance with local/regional/national/international regulations.
First Aid Measures:
Eyes: Flush with water for at least 15 minutes.
If irritation occurs and persists, obtain medical attention.
Skin: Remove contaminated clothing and thoroughly wash with soap and water.
If irritation occurs and persists, contact a medical doctor.
Ingestion: If conscious, rinse mouth with water.
Dilute by giving 1 or 2 glasses of water.
Do no induce vomiting.
Get medical attention immediately.
Inhalation: Remove to fresh air.
If breathing difficulty or discomfort occurs and persists, obtain medical attention.
Fire Extinguishing Media: Use any means suitable for extinguishing surrounding fire Water can be used.
Special Information: In the event of a fire, wear full protective clothing and NIOSH-approved self-contained breathing apparatus with full face piece operated in the pressure demand or other positive pressure mode.
Sealed containers of 2-Phosphonobutane -1,2,4-Tricarboxylic Acid or PBTC may rupture when heated.
Accidental Release Measures:
Small Spill: Use appropriate tools to put the spilled 2-Phosphonobutane-1,2,4-Tricarboxylic Acid or PBTCA; PBTC in a convenient waste disposal container.
Large Spill: Stop leak if without risk.
Avoid contact with a combustible material (wood, paper, oil, clothing...).
Keep damp using water spray.
Eliminate all ignition sources.
Release Notes: Keep 2-Phosphonobutane -1,2,4-Tricarboxylic Acid or PBTC out of streams and sewers.
Absorb spilled material on commercial oil absorbent or sand.
Put the contaminated absorbent into a DOT approved container and dispose of according to the methods outlined in the "Disposal Considerations" section.
Handling and Storage:
Keep 2-Phosphonobutane-1,2,4-Tricarboxylic Acid or PBTCA; PBTC in a tightly closed container, stored in a cool, dry, ventilated area.
Protect against physical damage.
Avoid storage on wood floors.
Avoid contact with eyes, skin clothing etc.
Do not swallow.
Containers of PBTC may be hazardous when empty since they retain product residues.
Exposure Controls/Personal Protection:
Ventilation System: A system of local and/or general exhaust is recommended to keep employee exposures below the Airborne Exposure Limits.
Local exhaust ventilation is generally preferred because it can control the emissions of the contaminant at its source, preventing dispersion of it into the general work area.
Personal Respirators (NIOSH Approved): For conditions of use where exposure to dust or mist is apparent and engineering controls are not feasible, a particulate respirator (NIOSH type N95 or better filters) may be worn.
If oil particles (e.g. lubricants, cutting fluids, glycerin, etc.) are present, use a NIOSH type R or P filter.
For emergencies or instances where the exposure levels are not known, use a full-face positive-pressure, air-supplied respirator.
WARNING: Air-purifying respirators do not protect workers in oxygen-deficient atmospheres.
Skin Protection: Wear protective gloves and clean body-covering clothing.
Eye Protection: Use chemical safety goggles.
Maintain eye wash fountain and quick-drench facilities in work area.
Stability and Reactivity of PBTC:
Conditions to Avoid: Store 2-Phosphonobutane-1,2,4-Tricarboxylic Acid or PBTCA; PBTC away from nitrites, sulfates and alkaline materials.
Do not store in mild steel containers (corrosive).
Keep 2-Phosphonobutane-1,2,4-Tricarboxylic Acid or PBTCA; PBTC containers tightly closed when not in use and when in transit.
Stability: Stable
Polymerization: Will not occur
Hazardous Decomposition Products: None
Incompatible Materials: Nitrites, sulfites and alkalis.
Synonyms:
MeSH Entry Terms:
2-phosphonobutane-1,2,4-tricarboxylic acid
2-phosphonobutane-1,2,4-tricarboxylic acid, sodium salt
2-phosphonobutane-1,2,4-tricarboxylic acid, trisodium salt
PBTA
PBTC tricarboxylic acid
Depositor-Supplied Synonyms HelpNew Window
2-PHOSPHONOBUTANE-1,2,4-TRICARBOXYLIC ACID
37971-36-1
1,2,4-Butanetricarboxylic acid, 2-phosphono-
PBTC
2-Phosphono-1,2,4-butanetricarboxylic acid
2-Phosophonobutane-1,2,4-tricarboxylic acid
C7H11O9P
2-Phosphonobutane-1,2,4-tricarbonic acid
EINECS 253-733-5
EC 253-733-5
Q-200319
40372-66-5
2-Phosphono butane-1,2,4-tricarboxylic acid
SCHEMBL22514
phosphonobutanetricarboxylic acid
DTXSID4027999
MFCD01940753
3-Carboxy-3-phosphonohexanedioic Acid
AKOS007930701
P458
DB-049222
FT-0613352
P1857
Butanetricarboxylic acid, 2-phosphono-1,2,4-
(S)-2-phosphonobutane-1,2,4-tricarboxylic acid
971P361
A823953
Q27255925
2-Phosphonobutane-1,2,4-tricarboxylic acid 50% in water
2- Phosphonobutane -1,2,4-tricarboxylic acid, tetra sodium salt
2-Phosphonobutane-1,2,4-tricarboxylic acid (ca. 50% in water)
2-Phosphonobutane-1,2,4-tricarboxylic acid(50% Aqueous solution)
