Thiocarbohydrazide (TCH)

1. Identification

Product Identifiers

Product Name

Thiocarbohydrazide (TCH)

Other Names

TCH

Product Number(s)

21900, EMS21900

CAS Number

2231-57-4

Recommended use of the chemical and restriction on use

Company Details

Emergency Contact Details

2. Hazards Identification

Classification of the substance or mixture

Label Elements

Signal Words

None

Hazard Statement(s)

• Fatal if swallowed, in contact with skin or if inhaled.
• Causes serious eye damage.

Precautionary Statement(s)

• Do not breathe dust/fume/gas/mist/vapours/spray.
• Do not get in eyes, on skin, or on clothing.
• Wash thoroughly after handling.
• Do not eat, drink or smoke when using this product.
• Use only outdoors or in a well-ventilated area.
• Wear protective gloves/protective clothing/eye protection/face protection.
• [In case of inadequate ventilation] wear respiratory protection.

Primary route(s) of entry

Human Health

Inhalation

Remove person to fresh air and keep comfortable for breathing.

Ingestion

Immediately call a poison centre/doctor. Rinse mouth.

Eyes

Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Skin

Wash with plenty of water. Take off immediately all contaminated clothing and wash it before reuse.

Environment

3. Composition / Information on Ingredients

4. First Aid Measures

Ingestion

Do not induce vomiting; immediately call for medical help.

Inhalation

Supply fresh air or oxygen; call for doctor.In case of unconsciousness place patient stably in side position for transportation.

Skin Contact

Immediately wash with water and soap and rinse thoroughly.

Eye Contact

Rinse opened eye for several minutes under running water. Then consult a doctor.

Other Information

Immediately remove any clothing soiled by the product.Remove breathing apparatus only after contaminated clothing have been completely removed.In case of irregular breathing or respiratory arrest provide artificial respiration.

5. Firefighting Measures

Suitable extinguishing equipment

Fire

CO₂, extinguishing powder or water spray.

Large Fire

Water spray or alcohol resistant foam.

HAZCHEM

Undetermined.

Special protective equipment and precautions for fire fighters

6. Accidental Release Measures

Personal precautions, protective equipment and emergency procedures

No special measures required.

Environmental precautions

Inform respective authorities in case of seep. Do not allow to enter sewers/surface or ground water.

Methods and materials for containment and clean up

Dispose contaminated material as waste according to item 13. Ensure adequate ventilation.

7. Handling and Storage

Precautions for safe handling

Thorough dedusting. Ensure good ventilation/exhaustion at the workplace. Open and handle receptacle with care. Keep respiratory protective device available.

Conditions for safe storage

Keep container tightly sealed when not in use.

8. Exposure Controls / Personal Protection

Exposure Standards

Engineering controls

• Keep away from foodstuffs, beverages and feed.
• Immediately remove all soiled and contaminated clothing.
• Wash hands before breaks and at the end of work.
• Store protective clothing separately.
• Avoid contact with the eyes.
• Avoid contact with the eyes and skin.

Personal protective equipment

Eye and face protection

Wear eye and face protection.

Skin protection

Protective gloves: The glove material has to be impermeable and resistant to the product/ the substance/ the preparation. Selection of the glove material on consideration of the penetration times, rates of diffusion and the degradation. The exact break through time has to be found out by the manufacturer of the protective gloves and has to be observed.

Body protection

Wear protective clothing.

Respiratory protection

In case of brief exposure or low pollution use respiratory filter device. In case of intensive or longer exposure userespiratory protective device that is independent of circulating air.

9. Physical and Chemical Properties

General information

Appearance

Crystalline, colourless

Odour

Characteristic

pH

Not applicable

Vapour Pressure

Not applicable

Density

Undetermined

Boiling Point

Undetermined

Melting Point

171-174°C

Solubility

Undetermined

Specific Gravity of Density

Undetermined

Flash Point

Not applicable

Flammable (Explosive) Limits

Product is not flammable

Ignition Temperature

Product is not self-igniting

Formula

Not available.

10. Stability and Reactivity

Reactivity

No further relevant information available.

Chemical stability

Stable under normal conditions of use.

Possibility of hazardous reactions

No dangerous reactions known.

Conditions to avoid

No further relevant information available

Incompatible materials

No further relevant information available.

11. Toxicological Information

Acute effects

No irritant effect.

Eye contact

Strong irritant with the danger of severe eye injury.

Skin contact

No irritant effect. Danger through skin absorption.

Ingestion

No irritant effect.

Inhalation

No irritant effect.

Chronic effects

No further relevant information available.

Toxicity and irritation

No irritant effect.

12. Ecological Information

Ecotoxicity

No further relevant information available.

Persistence and degradability

No further relevant information available.

Bioaccumulative potential

No further relevant information available.

Other adverse effects

• Water hazard class 1: slightly hazardous for water.
• Do not allow undiluted product or large quantities of it to reach ground water, water course or sewage system.

13. Disposal Considerations

General information

14. Transport Information

ADG label required

HAZCHEM

Undetermined.

UN Number

UN2811

Proper shipping name

TOXIC SOLID, ORGANIC, N.O.S. (Thiocarbohydrazide)

Transport hazard class

6.1 Toxic substances

Packing group

I

Environmental hazard

This is not a marine pollutant.

Special precautions for users

• Warning: Toxic substances
• Stowage Category: B

Additional information

• DOT
• Quantity limitations
• On passenger aircraft/rail: 5kg
• On cargo aircraft only: 50kg
• ADR
• Excepted quantities (EQ) Code: E
• Maximum net quantity per inner packaging: 1g
• Maximum net quantity per outer packaging: 300g
• IMDG
• Limited quantities (LQ) 0
• Excepted quantities (EQ) Code: E5
• Maximum net quantity per inner packaging: 1g
• Maximum net quantity per outer packaging: 300g

15. Regulatory Information

Poisons Schedule Number

No further information available.

Other Information

A Chemical Safety Assessment has not been carried out.

16. Other Information

SDS preparation date

2 March 2026

Comments

• Abbreviations and acronyms:
• ADR: Accord relatif au transport international des marchandises dangereuses par route (European Agreement Concerning the International
• Carriage of Dangerous Goods by Road)
• IMDG: International Maritime Code for Dangerous Goods
• DOT: US Department of Transportation
• IATA: International Air Transport Association
• EINECS: European Inventory of Existing Commercial Chemical Substances
• CAS: Chemical Abstracts Service (division of the American Chemical Society)
• NFPA: National Fire Protection Association (USA)
• HMIS: Hazardous Materials Identification System (USA)
• PBT: Persistent, Bioaccumulative and Toxic
• vPvB: very Persistent and very Bioaccumulative
• NIOSH: National Institute for Occupational Safety
• OSHA: Occupational Safety Health
• TLV: Threshold Limit Value
• PEL: Permissible Exposure Limit
• REL: Recommended Exposure Limit
• Acute toxicity - oral 1: Acute toxicity - Category 1
• Eye damage 1: Serious eye damage/eye irritation - Category 1
• This information is based on our present knowledge. However, this shall not constitute a guarantee for any specific product features and shall not establish a legally valid contractual relationship.

References

EMS Safety Data sheet Thiocarbohydrazide 01/05/2025 https://www.emsdiasum.com/docs/technical/msds/21900.pdf