| Formula: | C₄H₆O₂ |
| CAS Number: | 79-41-4 |
| EC Number (EINECS): | 201-023-2 |
| HS Code: | 29161400 |
| UN Number: | 2531 |
| IUPAC Name: | 2-Methylprop-2-enoic Acid |
| Also Known As: | 2-Methylacrylic Acid; α-Methylacrylic Acid |
| Molecular Weight, g/mol: | 86.09 |
| Appearance: | Clear, colorless liquid |
| Odor: | Pungent, acrid |
| Melting Point, °C: | 15–16 |
| Boiling Point, °C: | 161–163 |
| Density, g/cm³ (at 20°C): | 1.015 |
| Flash Point, °C: | 77 (closed cup) |
| Solubility: | Miscible with water and most organic solvents |
| pH (1% solution): | ~2.5 |
| Vapor Pressure (at 20°C): | 1.5 mmHg |
| Purity, %: | ≥99.0 |
| Grades Available: | Technical, Polymerization Grade |
| Packaging: | 200kg drums, 1000kg IBC, bulk ISO tanks |
Primary Applications
Key monomer in production of methacrylate esters (MMA, EMA, BMA)
Manufacture of specialty polymers and resins
Used in coatings, adhesives, and ion-exchange resins
Secondary Applications
Raw material in plastics and elastomers
Used in paper, leather, and textile finishing
Additive in construction and oilfield chemicals
End Industries Served: Polymers, Adhesives, Coatings, Construction, Textiles, Oil & Gas, Specialty Chemicals
Hazard Class (GHS): Flammable liquid (Category 3), Skin Corrosive (Category 1B), Acute Toxicity (Category 4)
Hazard Statements (H-Codes):
H226: Flammable liquid and vapor
H314: Causes severe skin burns and eye damage
H332: Harmful if inhaled
H335: May cause respiratory irritation
Precautionary Statements (P-Codes):
P210: Keep away from heat, sparks, open flames
P280: Wear protective gloves/eye protection
P301 + P330 + P331: IF SWALLOWED – rinse mouth; do not induce vomiting
Storage Conditions
Store under nitrogen in a cool, ventilated place
Keep container tightly sealed and away from sunlight
Always shipped and stored with polymerization inhibitor (MEHQ)
Transport Information
ADR/RID: Class 8, UN2531, PG II
IMDG: Class 8, UN2531
IATA: Class 8, UN2531