Maleic anhydride

CAS 108-31-6 C₄H₂O₃ MW 98.1000 Danger
Corrosion Corrosion
Skull and Crossbones Skull and Crossbones
Exclamation Mark Exclamation Mark
Health Hazard Health Hazard
Emergency: 911 | Poison Control: 1-800-222-1222

Hazard Statements

CodeStatementHazard Class
H302 Harmful if swallowed Acute toxicity, oral
H311 Toxic in contact with skin Acute toxicity, dermal
H314 Causes severe skin burns and eye damage Skin corrosion/irritation
H317 May cause an allergic skin reaction Sensitization, Skin
H318 Causes serious eye damage Serious eye damage/eye irritation
H330 Fatal if inhaled Acute toxicity, inhalation
H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled Sensitization, respiratory
H370 Causes damage to organs Specific target organ toxicity, single exposure
H371 May cause damage to organs Specific target organ toxicity, single exposure
H372 Causes damage to organs through prolonged or repeated exposure Specific target organ toxicity, repeated exposure
H373 May causes damage to organs through prolonged or repeated exposure Specific target organ toxicity, repeated exposure

Precautionary Statements

CodeStatement
P233 Keep container tightly closed.
P260 Do not breathe dust/fume/gas/mist/vapors/spray.
P261 Avoid breathing dust/fume/gas/mist/vapors/spray.
P262 Do not get in eyes, on skin, or on clothing.
P264 Wash hands [and ...] thoroughly after handling.
P264+P265 Wash hands [and ...] thoroughly after handling. Do not touch eyes.
P270 Do not eat, drink or smoke when using this product.
P271 Use only outdoors or in a well-ventilated area.
P272 Contaminated work clothing should not be allowed out of the workplace.
P280 Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/...
P284 [In case of inadequate ventilation] Wear respiratory protection.
P301+P317 IF SWALLOWED: Get medical help.
P301+P330+P331 IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
P302+P352 IF ON SKIN: wash with plenty of water/...
P302+P361+P354 IF ON SKIN: Take off Immediately all contaminated clothing. Immediately rinse with water for several minutes.
P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing.
P305+P354+P338 IF IN EYES: Immediately rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing.
P308+P316 IF exposed or concerned: Get emergency medical help immediately.
P316 Get emergency medical help immediately.
P317 Get emergency medical help.
P319 Get medical help if you feel unwell.
P320 Specific treatment is urgent (see ... on this label).
P321 Specific treatment (see information on this label and safety datasheet)).
P330 Rinse mouth.
P333+P317 If skin irritation or rash occurs: Get medical help.
P342+P316 If experiencing respiratory symptoms: Get emergence medical help immediately.
P361+P364 Take off immediately all contaminated clothing and wash it before reuse.
P362+P364 Take off contaminated clothing and wash it before reuse.
P363 Wash contaminated clothing before reuse.
P403 Store in a well-ventilated place.
P403+P233 Store in a well-ventilated place. Keep container tightly closed.
P405 Store locked up.
P501 Dispose of contents/container to ...

Exposure Limits

OSHA PEL1 mg-m3
NIOSH REL1 mg-m3
NIOSH IDLH10 mg-m3
Skin NotationYes — can be absorbed through skin

Physical Properties

Colorless needles, white lumps, or pellets with an irritating, choking odor.

Boiling Point396°F
Flash Point218°F
Vapor Pressure0.2 mmHg
Specific Gravity1.43 at 59°F

NFPA 704 Diamond

1
3
1
Health Fire Reactivity

Target Organs

Lungs Skin Eyes

severe eye irritation, skin and respiratory irritation, and sensitization

Synonyms

cis-butenedioic anhydride; 2,5-furanedione; maleic acid anhydride; toxilic anhydride

Data Sources

Disclaimer: This information is compiled from public regulatory databases for reference only. It does not replace the manufacturer's Safety Data Sheet (SDS). Always consult the official SDS for your specific product before handling chemicals.

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