Thiourea (CAS No. 62-56-6), a fine chemical intermediate used across industrial production, requires strict occupational safety and health controls during handling, storage and transport because of its chemical properties and potential health and environmental risks. The following technical reference is based on current chemical specifications and GHS classification standards.
Thiourea is typically a white crystalline solid. In industrial applications, purity and impurity control are critical to stable downstream processes.
| Item | Specification |
|---|---|
| Chemical formula | CH₄N₂S |
| Molar mass | 76.12 g/mol |
| Assay | ≥ 99.0 % |
| Melting point | 170 - 182 °C |
| Sulfate ash | ≤ 0.1 % |
These parameters are used to verify product quality and consistency before industrial use.
Under EU Regulation No. 1272/2008 (CLP), thiourea is classified as a chemical with multiple health and environmental hazards. Workplaces must implement the applicable precautionary statements.
These requirements apply to routine operations as well as maintenance and emergency response activities.
For transport, thiourea is classified as an environmentally hazardous substance (UN 3077, environmentally hazardous solid, n.o.s., Class 9, packing group III). Logistics operations must therefore use spill prevention measures and prevent releases into water or soil in accordance with international dangerous goods transport standards.
Storage and transfer areas should be designed to contain leaks and facilitate cleanup if packaging is damaged.
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