| Identification | More | [Name]
Isobutyric anhydride | [CAS]
97-72-3 | [Synonyms]
2-METHYLPROPANOIC ANHYDRIDE
2-METHYLPROPIONIC ANHYDRIDE
ALPHA-METHYLPROPIONIC ANHYDRIDE
A-METHYLPROPIONIC ANHYDRIDE
BIS(2-METHYLPROPIONIC ACID) ANHYDRIDE
DIMETHYLACETIC ANHYDRIDE
ISOBUTYRIC ANHYDRIDE
(iso-C3H7CO)2O
1-Methylpropanoic anhydride
2-Methylpropanoic acid anhydride
2-methyl-propanoicacianhydride
2-methylpropanoicacidanhydride
anhydrideisobutyrique
Isobutryic anhydride
Isobutyric acid anhydride
isobutyricacidanhydride
Isobutyryl anhydride
isobutyrylanhydride
isobutyryloxide
Propanoicacid,2-methyl-,anhydride | [EINECS(EC#)]
202-603-6 | [Molecular Formula]
C8H14O3 | [MDL Number]
MFCD00008913 | [Molecular Weight]
158.19 | [MOL File]
97-72-3.mol |
| Chemical Properties | Back Directory | [Appearance]
clear colorless liquid | [Melting point ]
-56 °C (lit.) | [Boiling point ]
182 °C (lit.) | [density ]
0.954 g/mL at 25 °C(lit.)
| [vapor density ]
5.45 (vs air)
| [vapor pressure ]
10 mm Hg ( 67 °C)
| [refractive index ]
n20/D 1.406(lit.)
| [Fp ]
152 °F
| [storage temp. ]
Store at 0°C | [form ]
Liquid | [color ]
Clear colorless | [explosive limit]
1.09%, 87°F | [Water Solubility ]
decomposes | [Sensitive ]
Moisture Sensitive | [BRN ]
386267 | [Dielectric constant]
13.9（20℃） | [Exposure limits]
ACGIH: TWA 10 ppm
NIOSH: TWA 10 ppm(30 mg/m3); STEL 15 ppm(45 mg/m3) | [LogP]
1.1 at 25℃ | [Uses]
Chemical intermediate. | [CAS DataBase Reference]
97-72-3(CAS DataBase Reference) | [NIST Chemistry Reference]
Propanoic acid, 2-methyl-, anhydride(97-72-3) | [EPA Substance Registry System]
97-72-3(EPA Substance) |
| Safety Data | Back Directory | [Hazard Codes ]
C | [Risk Statements ]
R34:Causes burns.
R21/22:Harmful in contact with skin and if swallowed . | [Safety Statements ]
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) . | [RIDADR ]
2922 | [WGK Germany ]
3
| [RTECS ]
NQ5550000 | [F ]
13-21 | [Autoignition Temperature]
624 °F | [TSCA ]
Yes | [HazardClass ]
8 | [PackingGroup ]
II | [HS Code ]
29159000 | [Hazardous Substances Data]
97-72-3(Hazardous Substances Data) | [Toxicity]
LD50 orally in Rabbit: 266 mg/kg LD50 dermal Rabbit 475 mg/kg |
| Hazard Information | Back Directory | [General Description]
A colorless liquid. Flash point 139°F. Burns skin and eyes. Vapors are heavier than air. | [Reactivity Profile]
ISOBUTYRIC ANHYDRIDE(97-72-3) reacts exothermically with water. The reactions are sometimes slow, but can become violent when local heating accelerates their rate. Acids accelerate the reaction with water. Incompatible with a cids, strong oxidizing agents, alcohols, amines, and bases. | [Air & Water Reactions]
Flammable. Reacts exothermically with water or moisture-containing materials to form isobutyric acid. | [Hazard]
Strong irritant to tissue. | [Health Hazard]
May cause toxic effects if inhaled or ingested/swallowed. Contact with substance may cause severe burns to skin and eyes. Fire will produce irritating, corrosive and/or toxic gases. Vapors may cause dizziness or suffocation. Runoff from fire control or dilution water may cause pollution. | [Fire Hazard]
Flammable/combustible material. May be ignited by heat, sparks or flames. Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids are lighter than water. | [Chemical Properties]
clear colorless liquid | [Definition]
ChEBI: An acyclic carboxylic anhydride of isobutyric acid. Metabolite observed in cancer metabolism. | [Preparation]
Isobutyric anhydride is prepared from iso-Butyryl chloride and Sodium acetate, or: from iso-Butyryl chloride and Butyric acid with a catalyst.
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