Phthalic anhydride
SIAL/320064 - ACS reagent, ≥99%
Synonym: 1,2-
CAS Number: 85-44-9
Empirical Formula (Hill Notation): C8H4O3
Molecular Weight: 148.12
EC Number: 201-607-5
MDL Number: MFCD00005918
Linear Formula: C8H4O3
Product Type: Chemical
anion traces | chloride (Cl-): ≤0.002% |
sulfate (SO42-): ≤0.003% | |
assay | ≥99% |
99.0-100.2% | |
autoignition temp. | 1058 °F |
bp | 284 °C (lit.) |
cation traces | Fe: ≤5 ppm |
heavy metals: ≤5 ppm (by ICP) | |
expl. lim. | 10.4 % |
form | flakes |
grade | ACS reagent |
ign. residue | ≤0.01% |
InChI | 1S/C8H4O3/c9-7-5-3-1-2-4- |
InChI key | LGRFSURHDFAFJT-UHFFFAOYSA |
mp | 131-134 °C (lit.) |
Quality Level | 200 ![]() |
SMILES string | O=C1OC(=O)c2ccccc12 |
vapor density | 5.1 (vs air) |
vapor pressure | <0.01 mmHg ( 20 °C) |
Application: | Phthalic anhydride may be used as a reactant in the preparation of N-substituted phthalimides, poly(isothianaphthene) and methyl (S)-2-phthalimido-4-methylt |
General description: | Phthalic anhydride is an anhydride of phthalic acid and a key intermediate in the production of plasticizers, dyes, polyesters resins, modifiers for rubber, and polymers. |
Legal Information: | Redi-Dri is a trademark of Sigma-Aldrich Co. LLC |
Other Notes: | Go to Redi-Dri™Product Listing 797995 ![]() |
Packaging: | 2.5 kg in poly drum |
Packaging: | 25, 500 g in glass bottle |
Symbol | ![]() ![]() ![]() |
Signal word | Danger |
Hazard statements | H302 - H315 - H317 - H318 - H334 - H335 |
Precautionary statements | P280 - P301 + P312 + P330 - P302 + P352 - P305 + P351 + P338 + P310 |
Hazard Codes | Xn |
Risk Statements | 22-37/38-41-42/43 |
Safety Statements | 23-24/25-26-37/39-46 |
RIDADR | UN 3077 9 / PGIII |
WGK Germany | WGK 1 |
Flash Point(F) | 305.6 °F - DIN 51758 |
Flash Point(C) | 152 °C - DIN 51758 |
Purity | ≥99%; 99.0-100.2% |
bp | 284 °C (lit.) |
mp | 131-134 °C (lit.) |
UNSPSC | 12352100 |