Isophthalic Acid

Name: Isophthalic Acid
Brand: Vaqora Chemicals
SKU: VQ-019484

About Isophthalic Acid

Isophthalic Acid is a specialty chemical in Industrial grade carrying the CAS registry number 121-91-5 at a purity of ≥99%. The compound has the formula C8H6O4, corresponding to a molecular weight of 166.13 g/mol. The IUPAC name is benzene-1,3-dicarboxylic acid. Common synonyms include 1,3-Benzenedicarboxylic acid and m-Phthalic acid.

The material typically appears as a white crystalline powder. Keep the container tightly sealed and store it in a cool, dry area. Handle it with standard laboratory precautions and appropriate personal protective equipment.

Typical applications include chemical manufacturing, industrial formulations, process chemistry and polymer and resin production. Our customers for this product work in pharmaceutical manufacturing, polymers and plastics and paints and coatings.

Available in 25 kg, 50 kg, 200 kg drum and 1 MT packs, Isophthalic Acid is dispatched with a Certificate of Analysis (COA) to destinations worldwide.

Typical applications

Chemical manufacturing
Industrial formulations
Process chemistry
Polymer & resin production

Industries

Specifications & identifiers

Chemical identifiers
Product name	Isophthalic Acid
Catalogue No.	VQ-019484
CAS Number	121-91-5
IUPAC name	benzene-1,3-dicarboxylic acid
Molecular formula	C₈H₆O₄
Molecular weight	166.13 g/mol
Exact mass	166.0266
Grade	Industrial
Purity / assay	≥99%
HSN code	29173910
InChIKey	QQVIHTHCMHWDBS-UHFFFAOYSA-N
SMILES	C1=CC(=CC(=C1)C(=O)O)C(=O)O
PubChem CID	8496

Physical properties
Physical form	Powder
Appearance	White crystalline powder
LogP (XLogP3)	1.7
H-bond donors / acceptors	2 / 4
TPSA	74.6 Å²
Synonyms	1,3-Benzenedicarboxylic acid, m-Phthalic acid, m-Benzenedicarboxylic acid, Acide isophtalique, Kyselina isoftalova, Isophthalate, m-Dicarboxybenzene, meta-benzenedicarboxylic acid, 4-09-00-03292 (Beilstein Handbook Reference), iso-phthalic acid, 3-Carboxybenzoic acid, Isoterephthalic acid

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Other grades of CAS 121-91-5

Synthesis

Isophthalic acid, 99%

CAS: 121-91-5
Formula: C₈H₆O₄
MW: 166.13 g/mol

VQ-008507

Frequently asked questions

What is the CAS number of Isophthalic Acid?

The CAS Registry Number of Isophthalic Acid is 121-91-5. It is also known as 1,3-Benzenedicarboxylic acid, m-Phthalic acid, m-Benzenedicarboxylic acid.

What is the molecular formula and molecular weight of Isophthalic Acid?

Isophthalic Acid has the molecular formula C8H6O4 and a molecular weight of 166.13 g/mol. Its IUPAC name is benzene-1,3-dicarboxylic acid.

Which grade and pack sizes of Isophthalic Acid can I order?

We supply Isophthalic Acid in Industrial (≥99%) grade, in 25 kg, 50 kg, 200 kg drum, 1 MT packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Isophthalic Acid?

Yes. Every lot of Isophthalic Acid is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can Isophthalic Acid be shipped internationally?

Yes. We export Isophthalic Acid worldwide by air and sea freight or express courier, on EXW, FOB, CIF, CFR or DAP Incoterms, with full export documentation.