Acetic Anhydride, or ethanoic anhydride is the simplest isolatable acid anhydride and is a widely used reagent in organic synthesis. It is a colourless liquid that smells strongly of acetic acid, formed by its reaction with the moisture in the air.
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Minimum Assay: >99% (BR/IR)
Molecular Formula: (CH3CO)2O
Molecular Weight: 102.09
Melting Point: -73.1°C
Boiling Point: 138-141.4° C
Refractive Index: 1.3900 (N20D)
Residue on Evaporation: <30ppm
Chlorides (Cl): Sulphates (So4): Ash: <0.005% (ASTM 482)
Haz Classification: Flammable liquids (Category 3),Acute toxicity, Oral (Category 4),Acute toxicity, Inhalation (Category 3)Skin corrosion (Category 1B),
Hazard Class: 8
Packing Group: 2
Hazard Phrazes: Causes severe skin burns and eye damage. Flammable liquid and vapour. Harmful if swallowed. Fatal if inhaled. May cause respiratory irritation.
Prec Phrazes: Keep away from heat/sparks/open flames/hot surfaces. Do not breathe dust/fume/gas/mist/vapours/spray. Wear protective gloves/protective clothing/eye protection/face protection. IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower. IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing.
Cas No: 108-24-7
Einecs No: 203-564-8
FP: 54 Deg C