Product Identification

Product Name

2-Methyl-2-Propenoic acid anhydride

Synonyms

2-Methylprop-2-enoyl 2-methylprop-2-enoate
Methacrylic acid anhydride
Methacryloyl anhydride

CAS

760-93-0

Formula

C8H10O3

Molecular Weight

154.18

EINECS

212-084-8

RTECS

OZ5700000

RTECS Class

Other

Beilstein/Gmelin

1761982

Beilstein Reference

4-02-00-01537

Physical and Chemical Properties

Solubility in water

Slightly soluble

Boiling Point

40 (0.1 torr)

Density

1.032 g/cm3 (20 C)

Refractive Index

1.4545 (20 C)

First Aid Measures

Ingestion

The possible benefit of early removal of some ingested material by cautious gastric lavage must be weighed against potential complications of bleeding or perforation. Activated charcoal activated charcoal binds most toxic agents and can decrease their systemic absorption if administered soon after ingestion. Activated charcoal: administer charcoal as a slurry (240 ml water/30 g charcoal). Usual dose: 25 to 100 g in adults/adolescents.

Inhalation

Move patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with beta2 agonist and corticosteroid aerosols.

Skin

Remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician should examine the area if irritation or pain persists. Treat dermal irritation or burns with standard topical therapy. Patients developing dermal hypersensitivity reactions may require treatment with systemic or topical corticosteroids or antihistamines.

Eyes

Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility.

Handling and Storage

Storage

Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.

Handling

All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.

Hazards Identification

Ingestion

Irritation or burns of the esophagus or gastrointestinal tract might follow ingestion.

Inhalation

Respiratory tract irritation may occur.

Skin

Dermal irritation and burns may occur. Sensitization might occur.

EC Risk Phrase

R 26 34

EC Safety Phrase

S 26 28 36/37/39 45

UN (DOT)

2927

Exposure Controls/Personal Protection

Personal Protection

Suitable protective clothing & self-contained resp protective apparatus should be available for use of those who may have to rescue persons overcome by fumes. Acrylic acid & derivatives.

Respirators

Use NIOSH/MSHA approved respirator appropriate for exposure of concern.

Fire Fighting Measures

Flash Point

84

Fire Fighting

(Non-Specific -- Methacrylic Acid) Keep unnecessary people away; isolate hazard area and deny entry. Stay upwind; keep out of low areas. Wear self-contained (positive pressure if available) breathing apparatus and full protective clothing.(Non-Specific -- Methacrylic Acid) This material may react violently with water. Small fires: dry chemical, carbon dioxide, water spray, or foam. Large fires: water spray, fog, or foam. Move container from fire area if you can do so without risk. Spray cooling water on containers that are exposed to flames until well after fire is out.

Accidental Release Measures

Small spills/leaks

(Non-Specific -- Methacrylic Acid) Do not touch spilled material; stop leak if you can do so without risk. For small spills, absorb with sand or other noncombustible absorbent material and place into containers for later disposal. For large spills, dike far ahead of spill for later disposal.

Stability and Reactivity

Stability

No data.

Incompatibilities

Reacts exothermically with water Incompatible with acids, strong oxidizing agents, alcohols, amines, and bases.

Transport Information

UN Number

2927