Acetic anhydride

SIGALD/33214 - puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., ≥99% (GC)

Synonym: Acetanhydride; Acetic acid anhydride; Acetyl acetate; Acetyl anhydride; Acetyl anhydride; Ethanoic anhydride

CAS Number: 108-24-7
Empirical Formula (Hill Notation): C₄H₆O₃
Molecular Weight: 102.09
EC Number: 203-564-8
MDL Number: MFCD00008705
Linear Formula: (CH₃CO)₂O
Product Type: Chemical

Catalog Number	PKG Qty.	Price


45-33214-500ML	500 mL	$74.60 1/EAAdd To Favorites	Add To Favorites
45-33214-1L	1 L	$135.00 1/EAAdd To Favorites	Add To Favorites
45-33214-2.5L	2.5 L	$322.00 1/EAAdd To Favorites	Add To Favorites

agency	reag. ISO
	reag. Ph. Eur.
	USP/NF
anion traces	chloride (Cl^-): ≤2 mg/kg
	phosphate (PO₄^3-): ≤10 mg/kg
	sulfate (SO₄^2-): ≤5 mg/kg
assay	≥99% (GC)
autoignition temp.	629 °F
bp	138-140 °C (lit.)
cation traces	Al: ≤0.5 mg/kg
	B: ≤0.02 mg/kg
	Ba: ≤0.1 mg/kg
	Ca: ≤0.5 mg/kg
	Cd: ≤0.05 mg/kg
	Co: ≤0.02 mg/kg
	Cr: ≤0.05 mg/kg
	Cu: ≤0.02 mg/kg
	Fe: ≤0.1 mg/kg
	Mg: ≤0.1 mg/kg
	Mn: ≤0.02 mg/kg
	Ni: ≤0.02 mg/kg
	Pb: ≤0.1 mg/kg
	Sn: ≤0.1 mg/kg
	Zn: ≤0.2 mg/kg
density	1.08 g/mL (lit.)
expl. lim.	10.3 %
grade	ACS reagent
	puriss. p.a.
impurities	≤0.003% non-volatile matter
	≤0.01% KMnO₄ red. matter (as O)
InChI	1S/C4H6O3/c1-3(5)7-4(2)6/h1-2H3
InChI key	WFDIJRYMOXRFFG-UHFFFAOYSA-N
mp	−73 °C (lit.)
Quality Level	200
refractive index	n20/D 1.390 (lit.)
SMILES string	CC(=O)OC(C)=O
suitability	passes test for reaction against H₂SO₄
vapor density	3.5 (vs air)
vapor pressure	10 mmHg ( 36 °C)
	4 mmHg ( 20 °C)

Application:	• Modification of Quinoa Starches: Acetic anhydride is used to modify the structure of starch molecules, discussing its implications on improving bread quality and food processing (Wang et al., 2024).
General description:	Acetic anhydride is a colorless liquid. On dissolution in water, it undergoes solvolysis to afford acetic acid. It is widely employed as acetylation reagent for the acetylation of various alcohols. Wacher process (starting reagent + a ketene) and Knapsack process (starting reagent = acetaldehyde) have been reported for the industrial preparation of acetic anhydride. It is employed as solvent for various organic reactions.
Other Notes:	The article number 33214-4X2.5L will be discontinued. Please order the single bottle 33214-2.5L which is physically identical with the same exact specifications. The article number 33214-4X2.5L-M will be discontinued. Please order the single bottle 33214-2.5L-M which is physically identical with the same exact specifications. The article number 33214-6X1L will be discontinued. Please order the single bottle 33214-1L which is physically identical with the same exact specifications. The article number 33214-6X1L-M will be discontinued. Please order the single bottle 33214-1L-M which is physically identical with the same exact specifications.
Packaging:	1, 6×1, 2.5, 4×2.5 L in poly bottle
Packaging:	500 mL in poly bottle

Symbol	GHS02,GHS05,GHS06
Signal word	Danger
Hazard statements	H226 - H302 - H314 - H330
Precautionary statements	P210 - P280 - P301 + P312 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338
Hazard Codes	C
Risk Statements	10-20/22-34
Safety Statements	26-36/37/39-45
RIDADR	UN 1715 3(8) / PGII
WGK Germany	WGK 1
Flash Point(F)	120.2 °F - closed cup
Flash Point(C)	49 °C - closed cup
Supplemental Hazard Statements	EUH071

Purity	≥99% (GC)
bp	138-140 °C (lit.)
mp	−73 °C (lit.)
Density	1.08 g/mL (lit.)
Refractive Index	n20/D 1.390 (lit.)
UNSPSC	12352100