Carbohydrazide, Carbonic Dihydrazide, Hydrazinecarboxamide, 497-18-7

Carbohydrazide, Carbonic Dihydrazide, Hydrazinecarboxamide, 497-18-7

CARBOHYDRAZIDE

SECTION 1: PRODUCT IDENTITY AND CHEMICAL IDENTIFICATION

Note: Carbohydrazide is an organic compound developed as a safer alternative to hydrazine. Its structure containing two hydrazine groups makes it a powerful reducing agent and chelating agent. It is widely used as an oxygen scavenger and corrosion inhibitor, particularly in boiler water treatment. It also serves as a cross-linking agent in polymer chemistry and as an intermediate in catalyst synthesis. It offers lower toxicity and a better safety profile compared to hydrazine.

SECTION 2: CHEMICAL STRUCTURE

Structure Description:

        O
        ‖
    H₂N—NH—C—NH—NH₂

    Carbohydrazide
    Carbonic Dihydrazide
    CH₆N₄O

Simplified Structure:

    (NH₂NH)₂CO

    Carbohydrazide
    (Carbonic acid dihydrazide)

SECTION 3: PHYSICAL AND CHEMICAL PROPERTIES

SECTION 4: CHEMICAL PROPERTIES AND REACTIVITY

SECTION 5: FUNCTIONAL PROPERTIES

SECTION 6: CARBOHYDRAZIDE vs HYDRAZINE COMPARISON

SECTION 7: APPLICATION AREAS

SECTION 8: QUALITY SPECIFICATIONS

SECTION 9: SAFETY AND TOXICOLOGICAL PROFILE

SECTION 10: GHS CLASSIFICATION AND LABELING

GHS Classification (in accordance with 1272/2008/EC):

Signal Word: Warning

Hazard Pictograms: GHS07 (Exclamation mark)

NFPA 704 Hazard Classification:

SECTION 11: PRECAUTIONARY STATEMENTS (P-CODES)

SECTION 12: FIRST AID MEASURES

SECTION 13: FIREFIGHTING MEASURES

SECTION 14: STORAGE AND SHELF LIFE

SECTION 15: PACKAGING OPTIONS

SECTION 16: TRANSPORTATION INFORMATION

SECTION 17: REGULATORY STATUS

SECTION 18: OTHER NAMES AND SYNONYMS

SECTION 19: SUMMARY TABLE

SECTION 20: CRITICAL WARNINGS AND BEST PRACTICES

CRITICAL WARNINGS:

1. Hydrazine Alternative: Carbohydrazide is a significantly safer alternative to hydrazine. It offers lower toxicity, better stability, and easier handling due to its solid form.

2. Oxygen Scavenger: Rapidly binds dissolved oxygen to prevent corrosion in boiler and water systems. Reaction: N₂H₄CO + O₂ → N₂ + CO₂ + 2H₂O

3. Hygroscopic: Absorbs moisture; store in tightly closed, dry containers.

4. Incompatible Materials: Do not contact with strong oxidizing agents and acids (violent reaction).

5. High Temperature: Decomposition begins above 150°C; avoid high temperatures.

6. Safety: Although safer than hydrazine, use appropriate PPE due to its irritant properties.

BEST PRACTICE RECOMMENDATIONS:

1. Dosage (Boiler Water): Adjust dosage based on dissolved oxygen concentration (typically 5-20 ppm carbohydrate for 2-10 ppm O₂).

2. Dissolution: Easily soluble in water; dissolve with mixing at 20-40°C.

3. pH Control: Use at pH 8.5-10.5 for optimal performance.

4. Storage: Store in cool, dry, airtight containers. Close tightly after opening.

5. Personal Protective Equipment: Nitrile gloves, safety goggles, dust mask (N95/FFP2), protective clothing.

6. Hygiene: Wash hands thoroughly after handling; Do not eat, drink or smoke when using this product.

7. Quality Control: Regularly perform assay (titration/HPLC), melting point, pH, water content, heavy metals tests.

8. Spill Cleanup: Avoid dust generation; use HEPA-filtered vacuum or wet cleaning; prevent entry into sewers or water bodies.

9. Disposal: Dispose of in accordance with local, regional, and national regulations.

LEGAL DISCLAIMER:

The information provided in this document is based on our current knowledge and experience and is presented in good faith. However, as all conditions of use are beyond our control, it does not constitute a binding specification or guarantee. This Technical Data Sheet is for informational purposes only. Users are responsible for testing suitability for their own applications and for complying with all local, regional, and national regulations. For complete safety, storage, use, handling, waste, and regulatory compliance information, please refer to the official Safety Data Sheet (SDS/MSDS) provided by the manufacturer/supplier.