1-(2-Chlorophenyl)-2-thiourea

CAS NO.：5344-82-1
Empirical Formula: C7H7ClN2S
Molecular Weight: 186.66
MDL number: MFCD00004934
EINECS: 226-291-6
SAFETY DATA SHEET (SDS)
Update Date: 2026-05-28 02:14:57

What is 1-(2-Chlorophenyl)-2-thiourea?

Chemical properties

white crystals or powder

General Description

Needles or plates. Used as an herbicide. Not registered as a pesticide in the U.S.

Reactivity Profile

When heated to decomposition 1-(2-Chlorophenyl)-2-thiourea emits very toxic fumes of chlorides, nitrogen oxides, and sulfur oxides. [EPA, 1998]. Organosulfides are incompatible with acids, diazo and azo compounds, halocarbons, isocyanates, aldehydes, alkali metals, nitrides, hydrides, and other strong reducing agents. Reactions with these materials generate heat and in many cases hydrogen gas. Many of these compounds may liberate hydrogen sulfide upon decomposition or reaction with an acid.

Health Hazard

High oral toxicity.

Fire Hazard

When heated to decomposition 1-(2-Chlorophenyl)-2-thiourea emits very toxic fumes of chlorides, nitrogen oxides, and sulfur oxides.

Properties of 1-(2-Chlorophenyl)-2-thiourea

Melting point:	144-149 °C
Boiling point:	250°C (rough estimate)
Density	1.4179 (rough estimate)
refractive index	1.6100 (estimate)
storage temp.	Keep in dark place,Inert atmosphere,Room temperature
pka	12.34±0.70(Predicted)
BRN	776946
CAS DataBase Reference	5344-82-1(CAS DataBase Reference)
NIST Chemistry Reference	Thiourea, (2-chlorophenyl)-(5344-82-1)
EPA Substance Registry System	1-(o-Chlorophenyl)thiourea (5344-82-1)

Safety information for 1-(2-Chlorophenyl)-2-thiourea

Signal word	Danger
Pictogram(s)	Skull and Crossbones Acute Toxicity GHS06
GHS Hazard Statements	H300:Acute toxicity,oral
Precautionary Statement Codes	P330:Rinse mouth. P301+P310:IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. P302+P350:IF ON SKIN: Gently wash with plenty of soap and water.