Hanson Chemicals

Methacrylic Acid (MAA)

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

Typical Specifications

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

Applications / Uses

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

Safety & Handling Information

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

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