CAS 9003-01-4 Polyacrylic acid - Materials / Alfa Chemistry

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Polyacrylic acid

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Catalog Number

ACM9003014-24

CAS Number

9003-01-4

Product Name

Polyacrylic acid

Structure

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

EC Number

201-177-9;618-347-7;611-106-7;616-286-0

Exact Mass

72.021129g/mol

1.0%

Formal Charge

Heat of Vaporization

10,955.1 gcal/gmole

Heavy Atom Count

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

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

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

XLogP3

0.3

MSDS

Download MSDS

COA

Download COA

Spec Sheet

Download Spec Sheet

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