Isophthalic acid
Agent Name
Isophthalic acid
Alternative Name
m-Phthalic acid
CAS Number
121-91-5
Formula
C8-H6-O4
Major Category
Other Classes
Synonyms
Acide isophtalique [French]; Benzene-1,3-dicarboxylic acid; IPA; Isophthalate; Kyselina isoftalova [Czech]; m-Benzenedicarboxylic acid; m-Phthalic acid; 1,3-Benzenedicarboxylic acid; [ChemIDplus]
Category
Organic Acids
Description
Colorless solid; [Hawley] Sublimes without decomposition; [Merck Index] Melting point = 347 deg C; [HSDB] Faintly beige powder; [MSDSonline]
Sources/Uses
Used to make plastics, unsaturated polyester resins, alkyd resins, polyamides, and thermoplastic polyesters; Used as a co-monomer with terephthalic acid to make plastic bottles and specialty resins; [HSDB] Used in formulations for adhesives, inks, wire enamels, and dental materials; [CAMEO]
Comments
A mild skin irritant; [ICSC] May cause irritation; [MSDSonline] No evidence of eye or skin irritation in animal studies; Caused kidney stones in animals fed >400 mg/kg per day; [AIHA]
Biomedical References
Exposure Assessment
MAK
5 mg/m3, inhalable fraction
Vapor Pressure
1.5E-08 mm Hg
Explanatory Notes
VP = 0.068 mm Hg at 100 deg C; [HSDB]
WEEL
10 mg/m3, (total dust), 5 mg/m3 (respirable fraction)
Diseases, Processes, and Activities Linked to This Agent
Processes
Industrial Processes with risk of exposure: