Isophthaloyl chloride, ≥99%

About Isophthaloyl chloride, ≥99%

Isophthaloyl chloride is a monomer carrying the CAS registry number 99-63-8, specified at ≥99% purity. Formula C8H4Cl2O2, molecular weight 203.02 g/mol. The IUPAC name is benzene-1,3-dicarbonyl chloride. Alternative names: Isophthaloyl dichloride and 1,3-Benzenedicarbonyl dichloride.

It is supplied as a colourless or white solid to liquid. Reported physical data include a melting point of 43-44 °C. Store in a cool, well-ventilated place, away from sources of ignition, with the container tightly sealed. The GHS classification uses the signal word “Danger”, so appropriate gloves, eye protection and ventilation are recommended.

Typical applications include polymerisation, crosslinking and curing and adhesives and coatings. It is used across polymers and plastics and paints and coatings.

Standard pack sizes are 100 g and 500 g, and every batch ships with a Certificate of Analysis (COA) and we export worldwide.

Typical applications

Polymerisation
Crosslinking & curing
Adhesives & coatings

Industries

Specifications & identifiers

Chemical identifiers
Product name	Isophthaloyl chloride, ≥99%
Catalogue No.	VQ-019026
CAS Number	99-63-8
IUPAC name	benzene-1,3-dicarbonyl chloride
Molecular formula	C₈H₄Cl₂O₂
Molecular weight	203.02 g/mol
Exact mass	201.9588
Purity / assay	≥99%
HSN code	29173990
InChIKey	FDQSRULYDNDXQB-UHFFFAOYSA-N
SMILES	C1=CC(=CC(=C1)C(=O)Cl)C(=O)Cl
PubChem CID	7451

Physical properties
Physical form	Liquid
Appearance	Colourless or white solid to liquid
Melting point	43-44 °C
LogP (XLogP3)	3.6
H-bond donors / acceptors	0 / 2
TPSA	34.1 Å²
UN number	UN 2923
Synonyms	Isophthaloyl dichloride, 1,3-Benzenedicarbonyl dichloride, m-Phthaloyl chloride, Isophthalic acid chloride, m-Phthalic dichloride, Isophthalic acid dichloride, Isophthalic chloride, Isophthalyl dichloride, Isothaloyl chloride, Isophthalyl chloride, m-Benzenedicarbonyl chloride, Dichlorid kyseliny isoftalove

Safety & hazard information (GHS)

Corrosive

Toxic

Harmful / irritant

Signal word: Danger

Hazard statements

H312Harmful in contact with skin
H314Causes severe skin burns and eye damage
H318Causes serious eye damage
H331Toxic if inhaled

Precautionary statements: P260, P261, P264, P264 + P265, P271, P280, P301 + P330 + P331, P302 + P352, P302 + P361 + P354, P304 + P340, P305 + P354 + P338, P316, P317, P321, P362 + P364, P363, P403 + P233, P405, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

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

Frequently asked questions

What is the CAS number of Isophthaloyl chloride, ≥99%?

The CAS Registry Number of Isophthaloyl chloride, ≥99% is 99-63-8. It is also known as Isophthaloyl dichloride, 1,3-Benzenedicarbonyl dichloride, m-Phthaloyl chloride.

What is the molecular formula and molecular weight of Isophthaloyl chloride, ≥99%?

Isophthaloyl chloride, ≥99% has the molecular formula C8H4Cl2O2 and a molecular weight of 203.02 g/mol. Its IUPAC name is benzene-1,3-dicarbonyl chloride.

Which grade and pack sizes of Isophthaloyl chloride, ≥99% can I order?

We supply Isophthaloyl chloride, ≥99% in (≥99%) grade, in 100 g, 500 g packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Isophthaloyl chloride, ≥99%?

Yes. Every lot of Isophthaloyl chloride, ≥99% 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 Isophthaloyl chloride, ≥99% be shipped internationally?

Yes. Isophthaloyl chloride, ≥99% is classified as hazardous (UN 2923), so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.