2-Sulfobenzoic anhydride, 95%

Name: 2-Sulfobenzoic anhydride, 95%
Brand: Vaqora Chemicals
SKU: VQ-012304

About 2-Sulfobenzoic anhydride, 95%

Vaqora Chemicals supplies 2-Sulfobenzoic anhydride, a sulfur heterocycle registered under CAS number 81-08-3 with a typical assay of 95%. Formula C7H4O4S, molecular weight 184.17 g/mol. Its systematic (IUPAC) name is 1,1-dioxo-2,1lambda6-benzoxathiol-3-one. It is also known as 2-Sulfobenzoic acid cyclic anhydride or o-Sulfobenzoic acid anhydride.

It is supplied as white to orange to green powder or crystals. Literature values give a melting point of 123-128 °C. Store in a tightly closed container in a cool, dry and well-ventilated place. The GHS classification uses the signal word “Danger”, so appropriate gloves, eye protection and ventilation are recommended.

Key uses span organic synthesis and API synthesis. Our customers for this product work in pharmaceutical manufacturing and academic and industrial research.

We offer 2-Sulfobenzoic anhydride in 25 g and 100 g packs with a batch-specific COA, and ship to customers worldwide.

Typical applications

Organic synthesis
API synthesis

Industries

Specifications & identifiers

Chemical identifiers
Product name	2-Sulfobenzoic anhydride, 95%
Catalogue No.	VQ-012304
CAS Number	81-08-3
IUPAC name	1,1-dioxo-2,1lambda6-benzoxathiol-3-one
Molecular formula	C₇H₄O₄S
Molecular weight	184.17 g/mol
Exact mass	183.983
Purity / assay	95%
HSN code	29332990
InChIKey	NCYNKWQXFADUOZ-UHFFFAOYSA-N
SMILES	C1=CC=C2C(=C1)C(=O)OS2(=O)=O
PubChem CID	65729

Physical properties
Physical form	Crystalline
Appearance	White to orange to green powder or crystals
Melting point	123-128 °C
LogP (XLogP3)	1
H-bond donors / acceptors	0 / 4
TPSA	68.8 Å²
Synonyms	2-Sulfobenzoic acid cyclic anhydride, o-Sulfobenzoic acid anhydride, o-Sulfobenzoic anhydride, o-Sulfobenzoic acid, cyclic anhydride, Benzoic acid, 2-sulfo-, cyclic anhydride, Benzoic acid, o-sulfo-, cyclic anhydride, 2-sulfobenzoic cyclic anhydride, Sulfobenzoic anhydride, 3H-2,1-Benzoxathiol-3-one, 1,1-dioxide, 3H-Benzo[c][1,2]oxathiol-3-one 1,1-dioxide, 2-Sulphobenzoic anhydride, 2,1-Benzoxathiol-3-one-1,1-dioxide

Safety & hazard information (GHS)

Corrosive

Harmful / irritant

Signal word: Danger

Hazard statements

H302Harmful if swallowed
H312Harmful in contact with skin
H314Causes severe skin burns and eye damage
H315Causes skin irritation
H318Causes serious eye damage
H319Causes serious eye irritation
H332Harmful if inhaled
H335May cause respiratory irritation

Precautionary statements: P260, P261, P264, P264 + P265, P270, P271, P280, P301 + P317, P301 + P330 + P331, P302 + P352, P302 + P361 + P354, P304 + P340, P305 + P351 + P338, P305 + P354 + P338, P316, P317, P319, P321, P330, P332 + P317, P337 + P317, P362 + P364, P363, P403 + P233

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

Other grades of CAS 81-08-3

2-Sulfobenzoic anhydride, 97%

CAS: 81-08-3
Formula: C₇H₄O₄S
MW: 184.17 g/mol

VQ-012305

Frequently asked questions

What is the CAS number of 2-Sulfobenzoic anhydride, 95%?

The CAS Registry Number of 2-Sulfobenzoic anhydride, 95% is 81-08-3. It is also known as 2-Sulfobenzoic acid cyclic anhydride, o-Sulfobenzoic acid anhydride, o-Sulfobenzoic anhydride.

What is the molecular formula and molecular weight of 2-Sulfobenzoic anhydride, 95%?

2-Sulfobenzoic anhydride, 95% has the molecular formula C7H4O4S and a molecular weight of 184.17 g/mol. Its IUPAC name is 1,1-dioxo-2,1lambda6-benzoxathiol-3-one.

Which grade and pack sizes of 2-Sulfobenzoic anhydride, 95% can I order?

We supply 2-Sulfobenzoic anhydride, 95% in (95%) grade, in 25 g, 100 g packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with 2-Sulfobenzoic anhydride, 95%?

Yes. Every lot of 2-Sulfobenzoic anhydride, 95% 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 2-Sulfobenzoic anhydride, 95% be shipped internationally?

Yes. 2-Sulfobenzoic anhydride, 95% 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.