methanethiol

CH4S

CAS74-93-1

Danger

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Identification

CAS Number: 74-93-1
EC Number: 200-822-1
UN Number: 1064
Index Number: 016-021-00-3
PubChem CID: 878

Physical-chemical properties

Molecular Formula: CH4S
Molar Mass: 48.11 g/mol
IUPAC Name: methanethiol

Chemical Identifiers

InChI: InChI=1S/CH4S/c1-2/h2H,1H3
InChI Key: LSDPWZHWYPCBBB-UHFFFAOYSA-N

Overview

methanethiol (CAS: 74-93-1) is a chemical compound widely used in industry. The molecular formula is CH4S. The molar mass is 48.11 g/mol.

Safety & Classification

Danger

Classification:

Flam. Gas 1; Press. Gas; Acute Tox. 3 *; Aquatic Acute 1; Aquatic Chronic 1

GHS Pictograms

Flame

GHS02

Flammable. May ignite on contact with air, water, or heat sources.

Gas Cylinder

GHS04

Gases under pressure. May explode if heated.

Skull and Crossbones

GHS06

Acute toxicity. Fatal if swallowed, in contact with skin, or if inhaled.

Environment

GHS09

Environmental hazard. Toxic to aquatic life with long lasting effects.

HHazard Statements (H-Statements)

Describe the nature and severity of the hazard

H220

Extremely flammable gas.

H331

Toxic if inhaled.

H400

Very toxic to aquatic life.

H410

Very toxic to aquatic life with long lasting effects.

Classification according to CLP Regulation (EC) No 1272/2008. The complete list of hazard and precautionary statements can be found in the Safety Data Sheet (SDS).

First Aid Measures

Inhalation

Toxic

Measures if vapours or dust are inhaled

First Aid Actions

+P304IF INHALED:
+P340Remove person to fresh air and keep comfortable for breathing.
+P311Call a POISON CENTER/doctor.

Related hazard statements:

H331

General Measures

Emergency 112 | Poison Control: +49 30 19240 (DE), +33 1 45 42 59 59 (FR), +31 30 274 88 88 (NL)

First aid measures are based on CLP classification and associated P-statements. They do not replace the Safety Data Sheet (SDS). In case of emergency, always consult the full SDS and a physician.

Transport (ADR)

UN Number	1064
ADR Class	2
Packing Group
Tunnel Code	B/D
Proper Shipping Name	Methylmercaptan, unter Druck verflüssigt
Marine Pollutant	No

Frequently Asked Questions

What is methanethiol?

methanethiol (CAS 74-93-1) is a chemical substance with the formula CH4S used in various industrial applications.

What are the properties of methanethiol?

methanethiol has a molar mass of 48.11 g/mol. It is classified as Flam. Gas 1; Press. Gas; Acute Tox. 3 *; Aquatic Acute 1; Aquatic Chronic 1. See the technical data above for more details.

How to store methanethiol safely?

methanethiol should be stored according to the Safety Data Sheet instructions. Follow the GHS labeling and keep the substance in a cool, dry and well-ventilated place.

Is methanethiol dangerous?

methanethiol carries the signal word "Danger". 4 GHS pictograms apply. Always follow the safety instructions in the data sheet.

Where can I buy methanethiol?

You can order methanethiol (CAS 74-93-1) from OYSI. We deliver across Europe and offer technical consulting as well as complete compliance documentation.