Physicochemical properties and dangerous characteristics of hydration
| Chemical name |
Hydrazine hydrate (36% water) |
Chemical common name | Hydrated hydrazine | |||||||||||||||||||||||||||||||||||||
| English name of the chemical | hydrazine hydrate | Common name English name | diamide hydrate | |||||||||||||||||||||||||||||||||||||
| Dangerous goods number | 82020 | UN | 2030 | CAS.NO | 10217-52-4 | |||||||||||||||||||||||||||||||||||
| Main ingredient | Pure | |||||||||||||||||||||||||||||||||||||||
| Physical and chemical properties | ||||||||||||||||||||||||||||||||||||||||
| Appearance and shape | Colorless fuming liquid with a slight ammonia odor. | |||||||||||||||||||||||||||||||||||||||
| Melting point °C | -40 | Boiling point °C | 119 | Relative density | 1.03 | Relative vapor density | No data | |||||||||||||||||||||||||||||||||
| Molecular formula | N2H4.H2O | Molecular weight | 50.06 | Saturation vapor pressure（kPa） | 0.67（25℃） | Heat of combustion (Kj/mol) | No data | |||||||||||||||||||||||||||||||||
| Critical temperature °C | No data | Critical pressure MPa | No data | Flash point℃ | 72.8℃ | Flash point °C | No data | |||||||||||||||||||||||||||||||||
| Fire hazard characteristics | Minimum ignition energy (mJ） | Explosion limit % (V/V） | 4.7-100 | |||||||||||||||||||||||||||||||||||||
| Solubility | Miscible with water, insoluble in chloroform, ether, miscible in ethanol. | |||||||||||||||||||||||||||||||||||||||
| Other physical and chemical properties | ||||||||||||||||||||||||||||||||||||||||
| Risk overview | ||||||||||||||||||||||||||||||||||||||||
| Risk category | Class 8.2 Alkaline Corrosives | Route of invasion | inhalation | √ | skin | √ | ingestion | √ | ||||||||||||||||||||||||||||||||
| Acute toxicity | LD50 | Rat oral: 129 mg/kg | LC50 | No data | Occupational hazard classification | |||||||||||||||||||||||||||||||||||
| Health hazard | Inhale the vapor of this product to stimulate the nose and upper respiratory tract. In addition, dizziness, nausea, vomiting, and central nervous system symptoms can occur. Liquid or vapor can cause irritation to the eye and can cause permanent damage to the eye. Irritating to the skin, can cause severe burns. It can cause poisoning through skin absorption. Can cause dermatitis. Oral causes dizziness, nausea, and later temporary central respiratory depression, heart rhythm disorders, and central nervous system symptoms such as lethargy, dyskinesia, ataxia, numbness, etc. Liver function can be abnormal. Chronic effects: Long-term exposure can lead to neurasthenia syndrome, liver enlargement and abnormal liver function. | |||||||||||||||||||||||||||||||||||||||
| Environmental hazard | It is harmful to the environment and can cause pollution to water bodies. | |||||||||||||||||||||||||||||||||||||||
| Explosion hazard | This product is flammable, highly toxic, highly corrosive and irritating, and can cause burns to the human body. | |||||||||||||||||||||||||||||||||||||||
| Stability and reactivity | ||||||||||||||||||||||||||||||||||||||||
| stability | Stable | polymerization hazard | no polymerization | decomposition products, | nitrogen oxides | |||||||||||||||||||||||||||||||||||
| Incompatible | Strong oxidants, strong acids, copper, zinc, etc. | Conditions to avoid contact | ||||||||||||||||||||||||||||||||||||||
| first-aid | ||||||||||||||||||||||||||||||||||||||||
| skin contact | Immediately remove contaminated clothing and rinse with plenty of running water for at least 15 minutes. Seek medical attention. | |||||||||||||||||||||||||||||||||||||||
| eye contact | Immediately lift the eyelids and rinse thoroughly with plenty of running water or saline for at least 15 minutes. Seek medical attention. | |||||||||||||||||||||||||||||||||||||||
| Inhalation | Quickly leave the scene to the fresh air. Keep the airway open. If breathing is difficult, give oxygen. If breathing stops, perform artificial respiration immediately. Seek medical attention. | |||||||||||||||||||||||||||||||||||||||
| Ingestion | Drink plenty of warm water and induce vomiting. Wash the stomach. Seek medical attention. | |||||||||||||||||||||||||||||||||||||||
| Fire-fighting measures | ||||||||||||||||||||||||||||||||||||||||
| Dangerous characteristics | In case of fire, high heat is flammable. Has strong reducibility. Strong reaction with oxidants, causing burning or explosion. In case of oxidized mercury, sodium metal, stannous chloride, 2,4-dinitrochlorobenzene, violent reaction. | |||||||||||||||||||||||||||||||||||||||
| Hazardous combustion products | Nitric oxide. | |||||||||||||||||||||||||||||||||||||||
| Fire fighting methods | In case of fire, firefighters must operate in a protective shelter. The liquid is escaping with water to dilute it into a non-combustible mixture, and the firefighters are protected by misty water. Extinguishing media: water spray, anti-solvent foam, carbon dioxide, dry powder. | |||||||||||||||||||||||||||||||||||||||
| Leakage emergency treatment | ||||||||||||||||||||||||||||||||||||||||
| Emergency treatment | Quickly evacuate personnel from the contaminated area to a safe area, and conduct isolation to strictly restrict access. Cut off the fire source. It is recommended that emergency personnel wear self-contained positive pressure breathing apparatus and wear acid and alkali protective overalls. Do not touch the spill directly. Cut off the source of the leak as much as possible. Prevent entry into restricted spaces such as sewers and flood drains. Small amount of leakage: Adsorption or absorption with sand or other non-combustible materials. It can also be rinsed with a large amount of water, diluted in water and placed in the wastewater system. A large number of leaks: building a dike or digging a pit. Transfer to a tank truck or special collector with a pump, recycle or transport to a waste disposal site for disposal. | |||||||||||||||||||||||||||||||||||||||
| Handling and storage | ||||||||||||||||||||||||||||||||||||||||
| Operational precautions | Closed operation, local exhaust. Operators must be specially trained to strictly follow the operating procedures. Operators are advised to wear self-priming filter gas masks (full face masks), rubber-resistant acid-base suits and rubber gloves. Keep away from fire, heat, and smoking in the workplace. Use explosion-proof ventilation systems and equipment. Prevent vapors from leaking into the workplace air. Avoid contact with oxidants, acids, and metal powders. Lightly load and unload during handling to prevent damage to packaging and containers. Equipped with the corresponding variety and quantity of fire-fighting equipment and leakage emergency treatment equipment. Empty containers may be harmful residues. | |||||||||||||||||||||||||||||||||||||||
| Storage considerations | Store in a cool, ventilated warehouse. Keep away from fire and heat. The temperature of the reservoir does not exceed 30 ° C, and the relative humidity does not exceed 80%. Keep the container sealed. It should be stored separately from oxidants, acids, metal powders, and food chemicals. Avoid mixing. Equipped with the appropriate variety and quantity of fire equipment. The storage area should be equipped with leakage emergency treatment equipment and suitable containment materials. The “five pairs” management system for extremely toxic substances should be strictly implemented. | |||||||||||||||||||||||||||||||||||||||
| Contact control / personal protection | ||||||||||||||||||||||||||||||||||||||||
| Exposure limit | MAC (mg/m3): 0.13 (skin) | |||||||||||||||||||||||||||||||||||||||
| Monitoring method | Dimethylaminobenzaldehyde spectrophotometry; solvent desorption-gas chromatography | |||||||||||||||||||||||||||||||||||||||
| engineering control | Closed operation, local exhaust. Safety showers and eyewash equipment are provided. | |||||||||||||||||||||||||||||||||||||||
| Respiratory protection | Self-priming filter respirators (full face masks) must be worn when exposed to vapors. Self-contained breathing apparatus is recommended for emergency rescue or evacuation. | |||||||||||||||||||||||||||||||||||||||
| Eye protection | Protection has been provided in respiratory protection. | |||||||||||||||||||||||||||||||||||||||
| Body protection | Wear rubber acid and alkali resistant clothing. | |||||||||||||||||||||||||||||||||||||||
| Hand protection | Wear rubber gloves. | |||||||||||||||||||||||||||||||||||||||
| Other protection | Smoking is strictly prohibited at the job site. After work, take a shower. Store clothes contaminated with poisons separately and wash them for later use. Pay attention to personal hygiene. | |||||||||||||||||||||||||||||||||||||||