Zinc powder (non-priming) Zn 65.4 : alias sub-lead powder, metal zinc powder, Zinc, metal, powder Dangerous classification and numbering of wet flammable items. GB4.3 class 43014. UN No. 1436 (zinc powder or zinc dust); IMDG CODE 4373, 4.3, sub-hazard 4.2. Self-igniting items. Use of anti-rust plating, dry batteries, coatings and insurance powder for iron products. The physicochemical properties are blue-gray or light-gray powder. Moist dust is easy to spontaneously ignite in the air, releasing a blue-green flame, which generates sparks when shaken to form zinc oxide. The relative density is 7.14. Mp 419.4 ° C. The boiling point of 907 ° C. The vapor pressure was 133.3 Pa (1 mmHg) (487 ° C) and reacted with water. The reaction with sulfuric acid and nitric acid is slow, and when a small amount of other metals such as copper, tin, and lead are contained, the reaction is accelerated. Hazardous characteristics Spontaneous ignition point 460 °C. The explosion limit is 500g/m3 or more. Dust and air can form an explosive mixture, which is easily ignited by an open flame and causes an explosion. Moist dust is easy to burn by itself in the air. Contact with water, acid or alkali metal hydroxide can put flammable hydrogen. Reacts with oxidants and sulfur can cause fire or explosion. Mouse abdominal cavity LD50: 15mg/kg. Dust can irritate the eyes, skin and respiratory system, and inhalation can cause coughing and low heat. The skin is exposed to zinc powder, which absorbs heat and can cause burns. Identify the type of accident: fire, explosion, poisoning Emergency measures Fire-fighting method: Use dry sand and dry powder to extinguish the fire. When the amount is small, a large amount of water can be used for saving. First Aid: Allow patients who inhale dust to get out of the contaminated area, rest and keep warm. The eyes are stimulated to rinse with plenty of water. Skin contact should be rinsed with plenty of water and thoroughly washed with soap. Inadvertently rushed to the hospital and sent to the hospital for treatment. Storage and transportation instructions packaging mark: wet flammable items. Sub-marker: self-igniting items. Packaging method: (II) class. The ignited zinc powder is filled with a glass bottle or an iron drum, filled with an inert gas gas seal, and a wooden box. Non-fired zinc powder is used in glass jars outside the wooden box or in iron drums lined with plastic bags. Storage and transportation conditions: Prevent the container from being damaged and store in a cool, dry and well-ventilated warehouse. Avoid getting wet. Isolation and storage with acids, strong bases, halogenated hydrocarbons, etc. Leakage treatment: Wear gas masks and gloves. Mix with sand, in an open place, pour into dilute hydrochloric acid consisting of 1:2 (concentrated hydrochloric acid plus water), place for 24 hours, and dilute the sewage into the wastewater system. |
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