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发布时间:2022/11/26 14:44:25 点击量： |
1 Chemical identification Chinese name: hydrogen peroxide; hydrogen peroxide solution English name: hydrogen peroxide Molecular formula: H2O2 Molecular weight: 34.01 CAS No.: 7722-84-1 Chemical category: inorganic peroxide 2 Composition/composition information Main ingredients: 35% Main uses: used for bleaching, medicine, and analytical reagent. 3 Hazard Overview Hazard category: Class 5.1 oxidant Exposure route: inhalation, ingestion, eyes, skin. Health hazard: cause burns. Harmful if swallowed. Irritating to eyes, respiratory system and skin. Environmental hazards: harmful to fish and toxic to water fleas. Physical and chemical hazards: strong oxidant. Danger: It may decompose when contacting with taboo substances. Heating can cause explosion. When mixed with organic substances, there is a risk of fire or explosion (higher than a certain concentration). Other hazards: corrosivity. May cause burns. 4 First aid measures Skin contact: Take off the contaminated clothes and wash with plenty of flowing water. Eye contact: immediately lift the eyelids and wash them thoroughly with a large amount of flowing water or normal saline for at least 15 minutes. Get medical attention. Inhalation: quickly leave the site to a place with fresh air. Keep the respiratory tract unobstructed. If breathing is difficult, give oxygen. If breathing stops, perform artificial respiration immediately. Get medical attention. Ingestion: drink enough warm water, induce vomiting, and seek medical advice. 5 Fire fighting measures Combustibility: non combustible Flash point (℃): meaningless Lower explosive limit (%): meaningless Upper explosive limit (%): meaningless Ignition temperature (℃): meaningless Minimum ignition energy (mJ): meaningless Maximum explosion pressure (Mpa): meaningless Suitable extinguishing medium: in case of fire involving products: spray water. Unsuitable extinguishing medium: all other extinguishing agents. Hazard characteristics: Oxygen will be released when decomposed by heat, which will aggravate the fire on site. There is danger of overpressure explosion when the container is heated. Special method: put out the fire at a safe distance in the upwind direction. Transfer all barreled products and packages exposed to fire. Use water spray to cool fixed containers or tanks. Special protective facilities for firefighters: Wear self-contained breathing equipment and protective clothing. 6 Emergency treatment for leakage Personal protection Evacuate irrelevant personnel and personnel not wearing full protective equipment. Prevent contact with skin and eyes, and prevent vapor inhalation. All sparks (ignition sources) and smoking are prohibited. If the leakage point can be safely plugged or sealed, the plugging shall be implemented. Remove all prohibited items. Environmental protection Embankment shall be built to prevent overflow. Pump the leakage into the passivated and marked emergency storage tank. Dilute with plenty of water before discharging into sewers or other environments. Cleaning method Recycling: Absorb with inert absorbent materials. It is prohibited to use the original container to contain the leakage, because there is a risk of decomposition. Neutralization: Dilute with water. 7 Handling and Storage Loading and unloading Technical measures/precautions: applicable to the safety measures for the storage and handling of corrosive liquids. Liquids. corrosive. Make sure there is a suitable breathing opening on the container. Provide shower and eye shower. There should be a large flow of water nearby. Suggestions for safe handling: prevent the overpressure from increasing. It is prohibited to enclose the product in pipes and containers. Conveying by gravity or pump. If necessary, dry nitrogen or dry air shall be used for pressure transmission. Avoid splashing during loading and unloading. keep in storage Technical measures/storage conditions: the storage place shall be far away from combustibles and oxides. Only use containers and equipment that are very clean and have no traces of impurities. It is prohibited to pour unused products back into the original container. Special for containers. Keep away from light. Prevent pollution. Protect against heat. Check the temperature regularly. Check the container regularly, and record any abnormal signs (corrosion, bulge, temperature rise). The breather pipe of the storage tank must be equipped with a filter to prevent impurities from entering. A collection tank shall be installed near the jetty. Taboos: combustible. Reducing agent. organic compound. Metal. metallic oxide. Alkali. Acetone. 8 Exposure control/personal protection Occupational exposure limits in the workplace China: PC-TWA: 1.5 mg/m3; PC-STEL: 3.75 mg/m3 Engineering control: the production process is closed and fully ventilated. Provide safety shower and eyewash equipment. Respiratory system protection: Self inhalation filter type gas mask (full face mask) should be worn when contacting with its vapor. Eye protection: the respiratory system has been protected. Body protection: wear polyethylene gas protective clothing. Hand protection: wear neoprene gloves. Others: Smoking is strictly prohibited at the work site. After work, take a shower and change clothes. Pay attention to personal hygiene. 9 Physical and chemical properties Appearance and properties: colorless transparent liquid with strong irritating odor. Melting point (℃): - 2 (no water) Boiling point (℃): 158 (without water) Relative density (water=1): 1.46 (anhydrous) Relative density (air=1): Saturated vapor pressure (kPa): 0.13 (15.3 ℃) Combustion heat (kJ/mol): meaningless Solubility: soluble in water, alcohol, ether, insoluble in benzene, petroleum ether. 10 Stability and Reactivity Stability: stable Polymerization hazard: no polymerization Conditions to avoid contact: heating. Taboos: flammable or combustible, strong reducing agent, copper, iron, iron salt, zinc, active metal powder. Combustion (decomposition) products: oxygen, water. 11 Toxicological data Acute toxicity Inhalation: Inhalation of high concentration steam or smoke can cause pulmonary edema and delayed reaction. At 170mg/m3 In the concentration of (saturated vapor concentration) (4 hours), it is not lethal to rats. Swallowing: human body: burns mouth, esophagus and stomach. Rapid oxygen release can cause gastric dilatation and bleeding, leading to serious injury and even death. Animal test results: Harmful if swallowed. LD50/rat inlet test=1200 mg/kg, 35% aqueous solution. Skin contact: animal: slightly damaged in contact with skin. 2000 mg/kg, 35% aqueous solution was applied to rabbits, which was non lethal. Local symptoms Inhalation: Inhalation of high concentration of vapor or smoke: it is harmful to the respiratory system. Skin contact: human body: the consequences of skin contact may include: discoloration. Erythema. Edema. Animal test results: Irritating skin. 35% aqueous solution, epidermal necrosis (rabbits for 4 hours). Eye contact: human body: may cause permanent eye damage. Animal test results: it has serious irritation to eyes (35% aqueous solution, rabbit). Sensitization Skin contact: animal test results: non skin sensitizer (mouse). Chronic toxicity By giving in drinking water. Stimulates gastric mucosal secretion. No effect dose (rats/3 months): 0.01% (26 mg/kg/d). Special effects Mutagenicity: in glass tube: genotoxic. In vivo: non genotoxic carcinogenicity: caries animal experiment: repeated forced feeding of this product may cause gastric tumors due to local irritation to gastric mucosa. Under the condition that the dose is much higher than that people are exposed to under normal use conditions, the test results with adverse effects have been observed in animals. 12 Environmental and ecological data Concentrated substance: 100% hydrogen peroxide residue/degradation performance Water: due to different mineral and microbial contents in the water, it can be decomposed within a few minutes to 24 hours. In air: degradation in the troposphere: half-life t1/2=10-20 hours. Degradation in the atmosphere: photodecomposition, which can react with OH base to wet deposition (moisture in the atmosphere) or dry deposition (on the ground). Total half-life t1/2:20 hours. Due to the different contents of minerals and microorganisms in soil and sediment, they can be decomposed within a few minutes to 24 hours. Bioaccumulation: Non bioaccumulation. Ecotoxicity -- toxicity of aquatic organisms. |
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