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Tioxolone

Also known as: 6-Hydroxy-1,3-benzoxathiol-2-one, 6-Hydroxy-2-oxo-1,3-benzoxathiole, 6-Hydroxybenzo[d][1,3]oxathiol-2-one, Acnosan, Camyna, Stepin, Thioxolone, Tioxolon

Tioxolone (CAS 4991-65-5) is a compound in the Ketones category listed in the Jingsj chemical database. It has the molecular formula C7H4O3S and a molecular weight of 168.170 g/mol. Key properties include a melting point of 158-160 °C(lit.), a boiling point of 377.8±44.0 °C at 760 mmHg, a density of 1.6±0.1 g/cm3 and a flash point of 182.3±28.4 °C. It is classified under GHS with signal word Warning and hazard statements H302 — Harmful if swallowed, H315 — Causes skin irritation and H319 — Causes serious eye irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
4991-65-5
Jingsj CID
J-3676-2
Molecular Formula
C7H4O3S
Molecular Weight
168.170 g/mol
Category
Ketones
Last updated
8/21/2026

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Physicochemical Properties

Melting Point158-160 °C(lit.)
Boiling Point377.8±44.0 °C at 760 mmHg
Density1.6±0.1 g/cm3
Flash Point182.3±28.4 °C
Exact Mass167.988113
PSA78.68000
LogP1.77
Vapor Pressure0.0±0.9 mmHg at 25°C
Refractive Index1.718

GHS Safety & Compliance

IrritantSignal word: Warning
  • H302 — Harmful if swallowed
  • H315 — Causes skin irritation
  • H319 — Causes serious eye irritation
  • H335 — May cause respiratory irritation

Activity & Biological Data

Additional Information[1]. http://en.wikipedia.org/wiki/Tioxolone

Customs & Trade Information

HS Code2930909090
Summary2930909090. other organo-sulphur compounds. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:30.0%

Frequently Asked Questions

What is the CAS number of Tioxolone?

The CAS number of Tioxolone is 4991-65-5.

What are the molecular formula and molecular weight of Tioxolone?

Tioxolone has molecular formula C7H4O3S and molecular weight 168.170 g/mol.

Is Tioxolone hazardous?

Tioxolone has GHS signal word Warning and hazard statements H302 — Harmful if swallowed; H315 — Causes skin irritation; H319 — Causes serious eye irritation.

What are the upstream and downstream products of Tioxolone?

For Tioxolone, Upstream Products: Resorcinol, Water, Copper(II) sulfate pentahydrate; Downstream Products: Dibenzyl ether.

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

Last updated:

How to cite: Jingsj. "Tioxolone (CAS 4991-65-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-3676-2 (accessed 2026-11-06).

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