| Formula / Notation | C8H6O4 |
|---|---|
| CAS Number | 121-91-5 |
| Molecular Weight | 166.13 |
| Melting Point | 653 °F (USCG, 1999) |
| Boiling Point | Sublimes |
| Density | 1.54 at 77 °F (USCG, 1999) - Denser than water; will sink |
| Solubility | Soluble in 8000 parts cold water, 460 parts boiling water; freely soluble in alcohol; practically insoluble in petroleum ether |
| Appearance | Isophthalic acid is a white solid with a slight unpleasant odor. Sinks in water. (USCG, 1999) |
| Also Known As | benzene-1,3-dicarboxylic acid; 121-91-5; Benzene-1,3-dicarboxylic acid; 1,3-Benzenedicarboxylic acid; m-Phthalic acid; m-Benzenedicarboxylic acid; Acide isophtalique; Kyselina isoftalova; DTXSID3021485; X35216H9FJ |
| Category | Acids |
What is Isophthalic acid?
Isophthalic acid is a benzenedicarboxylic acid that is benzene substituted by carboxy groups at position 1 and 3. One of three possible isomers of benzenedicarboxylic acid, the others being phthalic and terephthalic acids. It is a conjugate acid of an isophthalate(1-).
Formula & Notation
IUPAC Name: benzene-1,3-dicarboxylic acid
Other Names / Synonyms: benzene-1,3-dicarboxylic acid; 121-91-5; Benzene-1,3-dicarboxylic acid; 1,3-Benzenedicarboxylic acid; m-Phthalic acid; m-Benzenedicarboxylic acid; Acide isophtalique; Kyselina isoftalova; DTXSID3021485; X35216H9FJ
Properties & Characteristics
Physical Data
| Property | Value |
|---|---|
| Melting Point | 653 °F (USCG, 1999) |
| Boiling Point | Sublimes |
| Density | 1.54 at 77 °F (USCG, 1999) - Denser than water; will sink |
| Molecular Weight | 166.13 |
| Solubility | Soluble in 8000 parts cold water, 460 parts boiling water; freely soluble in alcohol; practically insoluble in petroleum ether |
| Appearance | Isophthalic acid is a white solid with a slight unpleasant odor. Sinks in water. (USCG, 1999) |
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
Isophthalic acid is a benzenedicarboxylic acid that is benzene substituted by carboxy groups at position 1 and 3. One of three possible isomers of benzenedicarboxylic acid, the others being phthalic and terephthalic acids. It is a conjugate acid of an isophthalate(1-).
Used in industrial chemical synthesis, fertilizer production, battery electrolytes, metal processing, and laboratory acid-base reactions.
Corrosive. Causes severe burns to skin, eyes, and respiratory tract. Wear appropriate PPE including gloves, goggles, and lab coat. Consult SDS before use.
The formula or notation for Isophthalic acid is: C8H6O4