Benzo[b]thiophene 1,1-dioxide

Also known as: Thianaphthene-1,1-dioxide, Thionaphthene-1,1-dioxide, 1-Benzothiophene 1,1-dioxide, 1-benzothiophene 1,1-dioxide, Benzothiophene 1,1-dioxide

Benzo[b]thiophene 1,1-dioxide (CAS 825-44-5) is a compound in the Pharma Intermediates category listed in the Jingsj chemical database. It has the molecular formula C8H6O2S and a molecular weight of 166.19700 g/mol. Key properties include a melting point of 138-142 °C, a boiling point of 371.1ºC at 760 mmHg, a density of 1.403g/cm3 and a flash point of 244ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 825-44-5
Jingsj CID: J-45826-4
Molecular Formula: C₈H₆O₂S
Molecular Weight: 166.19700 g/mol
Category: Pharma Intermediates
Last updated: 8/21/2026

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Physicochemical Properties

Melting Point	138-142 °C
Boiling Point	371.1ºC at 760 mmHg
Density	1.403g/cm3
Flash Point	244ºC
Exact Mass	166.00900
PSA	42.52000
LogP	2.52540
Refractive Index	1.64

Customs & Trade Information

HS Code	2934999090
Summary	2934999090. other heterocyclic compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0%

Frequently Asked Questions

What is the CAS number of Benzo[b]thiophene 1,1-dioxide?

The CAS number of Benzo[b]thiophene 1,1-dioxide is 825-44-5.

What are the molecular formula and molecular weight of Benzo[b]thiophene 1,1-dioxide?

Benzo[b]thiophene 1,1-dioxide has molecular formula C8H6O2S and molecular weight 166.19700 g/mol.

What are the upstream and downstream products of Benzo[b]thiophene 1,1-dioxide?

For Benzo[b]thiophene 1,1-dioxide, Upstream Products: 1-Benzothiophene, acetic acid; Downstream Products: 6-Aminobenzo[b]thiophene 1,1-dioxide, 1-Benzothiophene, Benzo[b]naphtho[1,2-d]thiophene.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "Benzo[b]thiophene 1,1-dioxide (CAS 825-44-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-45826-4 (accessed 2026-11-09).

Data for reference only; verify product details with suppliers before purchase.