Homophthalic anhydride, 98%

Name: Homophthalic anhydride, 98%
Brand: Vaqora Chemicals
SKU: VQ-009141

About Homophthalic anhydride, 98%

Homophthalic anhydride (CAS 703-59-3) is an acylating agent offered by Vaqora Chemicals with a typical assay of 98%. Formula C9H6O3, molecular weight 162.14 g/mol. Its systematic (IUPAC) name is 4H-isochromene-1,3-dione. Alternative names: Isochroman-1,3-dione and 1H-2-Benzopyran-1,3(4H)-dione.

It is supplied as white to orange to green powder or crystals. Key physical data: a melting point of 142 °C. Store sealed in a dry, well-ventilated location away from incompatible materials. It carries the GHS signal word “Warning” with 3 hazard statements. Review the Safety Data Sheet before use.

It is commonly used for fine chemical synthesis and organic synthesis. Typical end-use sectors are pharmaceutical manufacturing and academic and industrial research.

Vaqora Chemicals supplies Homophthalic anhydride in 5 g, 25 g and 100 g packs, each shipped with a Certificate of Analysis (COA), and exports worldwide.

Typical applications

Fine chemical synthesis
Organic synthesis

Industries

Specifications & identifiers

Chemical identifiers
Product name	Homophthalic anhydride, 98%
Catalogue No.	VQ-009141
CAS Number	703-59-3
IUPAC name	4H-isochromene-1,3-dione
Molecular formula	C₉H₆O₃
Molecular weight	162.14 g/mol
Exact mass	162.0317
Purity / assay	98%
HSN code	29333990
InChIKey	AKHSBAVQPIRVAG-UHFFFAOYSA-N
SMILES	C1C2=CC=CC=C2C(=O)OC1=O
PubChem CID	12801

Physical properties
Physical form	Crystalline
Appearance	White to orange to green powder or crystals
Melting point	142 °C
LogP (XLogP3)	0.7
H-bond donors / acceptors	0 / 3
TPSA	43.4 Å²
Synonyms	Isochroman-1,3-dione, 1H-2-Benzopyran-1,3(4H)-dione, Homophthalic acid anhydride, 1,3-Isochromandione, isochromane-1,3-dione, 3,4-dihydro-1H-2-benzopyran-1,3-dione, Benzoglutaric anhydride, 1H-Isochromene-1,3(4H)-dione, 2-benzopyran-1,3(4H)dione, 4H-benzo[c]pyran-1,3-dione, homophtalic anhydride, o-Carboxyphenylacetic acid cyclic anhydride

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation

Precautionary statements: P261, P264, P264 + P265, P271, P280, P302 + P352, P304 + P340, P305 + P351 + P338, P319, P321, P332 + P317, P337 + P317, P362 + P364, 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 Homophthalic anhydride, 98%?

The CAS Registry Number of Homophthalic anhydride, 98% is 703-59-3. It is also known as Isochroman-1,3-dione, 1H-2-Benzopyran-1,3(4H)-dione, Homophthalic acid anhydride.

What is the molecular formula and molecular weight of Homophthalic anhydride, 98%?

Homophthalic anhydride, 98% has the molecular formula C9H6O3 and a molecular weight of 162.14 g/mol. Its IUPAC name is 4H-isochromene-1,3-dione.

Which grade and pack sizes of Homophthalic anhydride, 98% can I order?

We supply Homophthalic anhydride, 98% in (98%) grade, in 5 g, 25 g, 100 g packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Homophthalic anhydride, 98%?

Yes. Every lot of Homophthalic anhydride, 98% 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 Homophthalic anhydride, 98% be shipped internationally?

Yes. Homophthalic anhydride, 98% is classified as hazardous, 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.