Benzothioxanthene dicarboxylic anhydride

Also known as: 1H,3H-2-Oxa-6-thiabenzo[a]pyrene-1,3-dione, 1H,3H-thioxantheno[2,1,9-def]-2-benzopyran-1,3-dione, 4,10-benzothioxanthene-3,1'-dicarboxylic acid anhydride, BENZOTHIOANTHENEDICARBOXYLICANHYDRIDE, Benzo[kl]thioxanthene-3,4-dicarboxylic anhydride, Benzothioxanthene-3,4-dicarboxylic anhydride, Benzothioxanthenedicarboxylic acid anhydride, Thioxantheno[2,1,9-def]isochromene-1,3-dione, Thioxantheno[2,1,9-dej]isochromene-1,3-dione, benzo[kl]thioxanthene-3,4-dicarboxylic acid anhydride

Benzothioxanthene dicarboxylic anhydride (CAS 14121-49-4) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C18H8O3S and a molecular weight of 304.31900 g/mol. Key properties include a boiling point of 602.1ºC at 760mmHg, a density of 1.56g/cm3 and a flash point of 331.4ºC. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 14121-49-4
Jingsj CID: J-1351771-0
Molecular Formula: C₁₈H₈O₃S
Molecular Weight: 304.31900 g/mol
Category: Organic Acids
Last updated: 8/21/2026

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Physicochemical Properties

Boiling Point	602.1ºC at 760mmHg
Density	1.56g/cm3
Flash Point	331.4ºC
Exact Mass	304.01900
PSA	75.52000
LogP	4.11210
Vapor Pressure	1.89E-14mmHg at 25°C
Refractive Index	1.816

Customs & Trade Information

HS Code	2932999099
Summary	2932999099. other heterocyclic compounds with oxygen hetero-atom(s) only. 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 Benzothioxanthene dicarboxylic anhydride?

The CAS number of Benzothioxanthene dicarboxylic anhydride is 14121-49-4.

What are the molecular formula and molecular weight of Benzothioxanthene dicarboxylic anhydride?

Benzothioxanthene dicarboxylic anhydride has molecular formula C18H8O3S and molecular weight 304.31900 g/mol.

What are the upstream and downstream products of Benzothioxanthene dicarboxylic anhydride?

For Benzothioxanthene dicarboxylic anhydride, Upstream Products: 4-Nitro-1,8-naphthalic anhydride, 2-Aminothiophenol, 4-Bromo-1,8-naphthalic anhydride.

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. "Benzothioxanthene dicarboxylic anhydride (CAS 14121-49-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1351771-0 (accessed 2026-11-09).

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