Thiourea
CAS 62-56-6
EC 200-543-5
Formula CH4N2S
MW 76.12 g/mol
Catalysts & Catalyst Precursors Printing & PackagingPharmaceuticals & HealthcareFood & Nutrition CatalysisPreservation & BiocideFlavoring & Acidulant
Description
Thiourea (CAS 62-56-6, EC 200-543-5), also known by the abbreviations THU and 2-thiourea, is an organosulfur compound with the formula CH4N2S. It carries no assigned E-code. It is structurally analogous to urea, with a sulfur atom replacing the oxygen.
In pharmaceutical manufacturing, thiourea acts as a reducing agent and catalyst precursor in the synthesis of heterocyclic compounds and active pharmaceutical ingredients. In printing and photographic processing, it functions as a toning and fixing agent by forming stable metal-sulfide complexes. It also serves as an antimicrobial agent in certain preservation applications.
Thiourea is supplied as crystalline solid and is subject to REACH registration requirements within the EU. Buyers should verify compliance with applicable occupational exposure limits and classification under CLP Regulation (GHS). It is available under HS code 29309070, typically in technical grade, with packaging formats suited to industrial procurement volumes.
In pharmaceutical manufacturing, thiourea acts as a reducing agent and catalyst precursor in the synthesis of heterocyclic compounds and active pharmaceutical ingredients. In printing and photographic processing, it functions as a toning and fixing agent by forming stable metal-sulfide complexes. It also serves as an antimicrobial agent in certain preservation applications.
Thiourea is supplied as crystalline solid and is subject to REACH registration requirements within the EU. Buyers should verify compliance with applicable occupational exposure limits and classification under CLP Regulation (GHS). It is available under HS code 29309070, typically in technical grade, with packaging formats suited to industrial procurement volumes.
Physical Properties
| Melting Point | 176-178 °C |
| Boiling Point | 150-160 °C |
| Density | 1.405 g/cm³ |
| Appearance | Thiourea consists of colorless, lustrous crystals or powder with a bitter taste. |
| Color | White to almost white |
| Odor | Odorless |
| Form | Crystals |
| Water Solubility | 13.6 g/100 mL (20 ºC) |
| Refractive Index | 1.5300 (estimate) |
| pH | 6-8 (50g/l, H2O, 20℃) |
| Log P | -1.050 (est) |
Safety & Handling (Learn More)
Warning GHS07 GHS08 GHS09
H
H302H315H317H320H335H351H361H372H373H401H411
P
P203P260P261P264P270P271P272P273P280P318P319P321P330P391P405P501P264+P265P301+P317P302+P352P304+P340P332+P317P333+P317P337+P317P362+P364P403+P233P305+P351+P338
Trade & Regulatory
| HS Code | 29309070 |
| UN Number | 2811 |
| ADR Class | 6.1 |
| Packing Group | III |
| Storage Class | 11 - Combustible Solids |
| WGK (Germany) | 2 |
Other Names
2-thioureathiocarbamideaminothioamideTHUTHIO(NH2)2CSSULFOUREAai3-035822-thio-ure
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Raw Materials
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