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4-Chlorobenzyl mercaptan

Also known as: (4-Chlorophenyl)methanethiol, p-Chlorobenzyl mercaptan, 4-Chloro-alpha-toluenethiol, p-Chlorotoluene-alpha-thiol, Benzenemethanethiol, 4-chloro-

4-Chlorobenzyl mercaptan (CAS 6258-66-8) is a compound in the Alcohols category listed in the Jingsj chemical database. It has the molecular formula C7H7ClS and a molecular weight of 158.648 g/mol. Key properties include a melting point of 19-20 °C(lit.), a boiling point of 233.2±15.0 °C at 760 mmHg, a density of 1.2±0.1 g/cm3 and a flash point of 76.7±0.0 °C. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.
6258-66-8
Jingsj CID
J-1993052-0
Molecular Formula
C7H7ClS
Molecular Weight
158.648 g/mol
Category
Alcohols
Last updated
8/21/2026
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Physicochemical Properties

Melting Point19-20 °C(lit.)
Boiling Point233.2±15.0 °C at 760 mmHg
Density1.2±0.1 g/cm3
Flash Point76.7±0.0 °C
Exact Mass157.995697
PSA38.80000
LogP3.33
Vapor Pressure0.1±0.4 mmHg at 25°C
Refractive Index1.582

GHS Safety & Compliance

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

Frequently Asked Questions

What is the CAS number of 4-Chlorobenzyl mercaptan?

The CAS number of 4-Chlorobenzyl mercaptan is 6258-66-8.

What are the molecular formula and molecular weight of 4-Chlorobenzyl mercaptan?

4-Chlorobenzyl mercaptan has molecular formula C7H7ClS and molecular weight 158.648 g/mol.

Is 4-Chlorobenzyl mercaptan hazardous?

4-Chlorobenzyl mercaptan has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.

What are the upstream and downstream products of 4-Chlorobenzyl mercaptan?

For 4-Chlorobenzyl mercaptan, Upstream Products: 4-Chlorobenzyl chloride, Propionic anhydride; Downstream Products: 4-Chlorotoluene, bis(p-Chlorobenzyl)disulfide, Thiobencarb.

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

Last updated:

How to cite: Jingsj. "4-Chlorobenzyl mercaptan (CAS 6258-66-8)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1993052-0 (accessed 2026-11-09).

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