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Polyacrylic acid
Catalog Number
ACM9003014-24
Product Name
Polyacrylic acid
Structure
CAS
9003-01-4
Category
Polymers
Synonyms
PAA Polymer
Description
Poly(acrylic acid) (PAA or Carbomer) is generic name for synthetic high molecular weight polymers of acrylic acid. They may be homopolymers of acrylic acid, crosslinked with an allyl ether pentaerythritol, allyl ether of sucrose or allyl ether of propylene. In a water solution at neutral pH, PAA is an anionic polymer, i.e. many of the side chains of PAA will lose their protons and acquire a negative charge. This makes PAAs polyelectrolytes, with the ability to absorb and retain water and swell to many times their original volume. Dry PAAs are found in the market as white and fluffy powders.
IUPAC Name
prop-2-enoic acid
Molecular Weight
72.06g/mol
Molecular Formula
C3H4O2
Canonical SMILES
C=CC(=O)O
InChI
InChI=1S/C3H4O2/c1-2-3(4)5/h2H,1H2,(H,4,5)
InChI Key
NIXOWILDQLNWCW-UHFFFAOYSA-N
Boiling Point
286 °F at 760 mm Hg (NTP, 1992);286 °F at 760 mm Hg (NIOSH, 2016);141.2 °C;142 °C;141 °C;286°F;286°F
Melting Point
106ºC
Flash Point
61.6ºC
Density
1.09 (30% aq.)
Solubility
greater than or equal to 100 mg/mL at 63° F (NTP, 1992);Miscible (NIOSH, 2016);13.88 M;Miscible with alcohol, and ether;Miscible with ethanol, ethyl ether; soluble in acetone, benzene, carbon tetrachloride;Miscible with chloroform;Miscible with water /1X10+6 mg/L/ at 25 °C;Soluble in methanol, ethanol, dioxane, dimethylformamide, 2-propanol, formamide, ethylene glycol, and acetic acid;Soluble in water;1000 mg/mL;Solubility in water: miscible;Miscible
Appearance
Colorless viscous liquid
Application
Iron & steel factories, chemical fertilizer plants, refineries, and air conditioning systems.
Storage
Storage for one year in shady room.
Color/Form
Acrid liquid;Liquid;Colorless liquid;Colorless liquid or solid (below 55 degrees F)
Complexity
55.9
Corrosivity
Corrosive to metals
Covalently-Bonded Unit Count
1
EC Number
201-177-9;618-347-7;611-106-7;616-286-0
Exact Mass
72.021129g/mol
Formal Charge
0
Heat of Vaporization
10,955.1 gcal/gmole
Heavy Atom Count
5
ICSC Number
0688
Log P
0.25700
MeSH Entry Terms
2-propenoic acid;acrylate;acrylic acid;acrylic acid, aluminum salt;acrylic acid, ammonium salt;acrylic acid, Ca (2:1) salt;acrylic acid, Ca (2:1) salt, dihydrate;acrylic acid, cobalt (2+) salt;acrylic acid, Fe (3+) salt;acrylic acid, magnesium salt;acrylic acid, potassium salt;acrylic acid, silver salt;acrylic acid, sodium salt;acrylic acid, zinc salt;Hystoacril;magnesium acrylate;vinylformic acid
Monoisotopic Mass
72.021129g/mol
NSC Number
165257;114472;112123;112122;106037;106036;106035;106034;226569;4765
Odor
Acrid odor and fumes;Quality: rancid, sweet; hedonic tone: unpleasant;Distinctive, acrid odor
Other Experimental
Polymerizes readily in the presence of oxygen;Corrosive liquid;BP: 122.0 °C at 400 mm Hg; 103.3 °C at 200 mm Hg; 86.1 °C at 100 mm Hg; 66.2 °C at 40 mm Hg; 39.0 °C at 10 mm Hg; 27.3 °C at 5 mm Hg;1 ppm in air = 3 mg/cu m;Heat of Fusion: 9.51 kJ/mol at 12.5 °C;Activated carbon adsorbability: 0.129 g/g carbon;Saturated concentration in air: 12.6 g/cu m at 20 °C, 22.8 g/cu m at 30 °C;Ratio of specific heats of vapor: 1.121; Heat of polymerization: -463 BTU/lb= -257 cal/g= -10.8X10+5 J/kg; Reid vapor pressure: 0.2 psia;Liquid heat capacity: 0.460 BTU/lb-F at 106 °F; Saturated vapor density: 0.00106 lb/cu ft at 70 °F; Ideal gas heat capacity: 0.257 BTU/lb-F at 75 °F;Bulk density: 8.6 lb/gal at 20 °C;Henry's Law constant = 3.7X10-7 atm-cu m/mol at 25 °C (est);Hydroxyl radical reaction rate constant = 1.75X10-11 cu cm/molec-sec at 25 °C;Ozone reaction rate constant = 6.5X10-19 cu cm/molec-sec at 25 °C;Glass transition temperature: 106-126 °C; decomposes above 250 °C, liberating carbon dioxide;Hygroscopic; forms clumps when added to water
PH
3.0-4.5 (1% water solution)
Properties
Polyacrylic acid is innoxious. It is soluble in water.
Refractive Index
n20/D 1.442
Rotatable Bond Count
1
RTECS Number
AS4375000;AT4680000
Solid Content
30%, 40%, 50%, 60%
Stability
Stable under normal temperatures and pressures.
Storage Conditions
Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
UNII
J94PBK7X8S
UN Number
2218;2218;2218;2218;2218;2218
Vapor Density
2.5 (NTP, 1992) (Relative to Air);2.5 (Air = 1);Relative vapor density (air = 1): 2.5
Vapor Pressure
3.2 mm Hg at 68 °F ; 5 mm Hg at 81.1° F (NTP, 1992);3 mm Hg (NIOSH, 2016);3.97 mmHg;3.97 mm Hg at 25 °C;Vapor pressure, Pa at 20 °C: 413;3 mmHg;3 mmHg
WGK Germany
3
XLogP3
0.3
MSDS
COA
Spec Sheet
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Poly(acrylic acid), M.W ~3,000
CAS: 9003-01-4
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Poly(acrylic acid), M.W ~2,000
CAS: 9003-01-4
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CAS: 9003-01-4
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Poly(acrylic acid) 50% solution
CAS: 9003-01-4
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Sodium polyacrylate, 50% w/w in H2O
CAS: 9003-04-7
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Sodium polyacrylate, average Mw 5000,000-7000,000, 80 mesh
CAS: 9003-04-7
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