[Chemical Knowledge]：Specification for storage and transportation of insoluble sulfur

In the field of chemical production raw materials, insoluble sulfur is an important material, because of its special nature, insoluble sulfur in the storage and transportation process need to comply with certain safety regulations. This article will introduce the safety storage and transportation specifications of insoluble sulfur from the aspects of physical and chemical properties, risk overview, first aid measures, fire control measures, leakage emergency treatment, operation disposal and storage, contact control/personal protection, physical and chemical characteristics, stability and reactivity, toxicological data, ecological data, disposal, transportation information and regulatory information.

1. physical and chemical properties

insoluble sulfur is a light yellow crystal or powder, with a special smell. Its molecular formula is S8, the relative molecular mass is 256.5, the melting point is 119 ℃, the boiling point is 444.6 ℃, and the ignition point is 255 ℃. Insoluble sulfur insoluble in water, slightly soluble in ethanol, methanol, soluble in carbon disulfide.

2. Hazard Overview

Insoluble sulfur belongs to Class 4.1 flammable solid, flammable in case of open flame and high heat, and can form explosive mixture when mixed with oxidant. Dust mixed with air may form an explosive mixture, which can cause pollution to water bodies.

3. first aid measures When

inhale insoluble sulfur dust, they should quickly leave the site and move to a place with fresh air to keep the respiratory tract unobstructed. If breathing is difficult, oxygen should be given. When ingestion of insoluble sulfur, gargle immediately, drink plenty of warm water, induce vomiting, and seek medical attention. In case of skin contact with insoluble sulfur, immediately remove contaminated clothing, rinse with plenty of flowing water for at least 15 minutes, and seek medical attention. In case of eye contact, immediately lift the eyelid, rinse thoroughly with plenty of flowing water or saline for at least 15 minutes, and seek medical attention.

4. fire protection measures

insoluble sulfur in case of fire, the container should be moved from the fire site to the open area as far as possible, and water should be sprayed to keep the fire site container cool until the end of fire fighting. Containers in a fire scene that have discolored or produced sound from the safety pressure relief device must be evacuated immediately. Fire extinguishing agent can be selected from water, foam, dry powder and sand.

5. leakage emergency treatment

isolate the leakage pollution area and restrict access. Cut off the fire source. It is recommended that emergency treatment personnel wear dust mask (full face mask) and general work clothes. Do not touch the leak directly. In case of a small amount of leakage, avoid raising dust and collect it in a dry, clean and covered container with a clean shovel. When there is a large amount of leakage, cover it with plastic cloth and canvas. It is then collected for recycling or transported to a waste treatment site for disposal.

6. operation disposal and storage

operation precautions: closed operation, local exhaust. Operators must be specially trained and strictly abide by the operating procedures. Operators are advised to wear self-priming filter dust masks, chemical safety goggles and anti-static overalls. Keep away from fire and heat sources. Smoking is strictly prohibited in the workplace. Use explosion-proof ventilation systems and equipment. Avoid creating dust. Avoid contact with oxidizing agents. Handle lightly to prevent damage to packaging and containers. Equipped with corresponding types and quantities of fire fighting equipment and leakage emergency treatment equipment. Empty containers may leave harmful substances.

storage precautions: stored in a cool, ventilated warehouse. Keep away from fire and heat source. The warehouse temperature should not exceed 30 ℃. Keep container sealed. Should be stored separately from the oxidant, do not mix storage. Explosion-proof lighting and ventilation facilities shall be adopted. It is forbidden to use mechanical equipment and tools that are easy to produce sparks. The storage area shall be provided with suitable materials to contain spills.

7. contact control/personal protection

engineering control: the production process is closed and fully ventilated. Safety shower and eyewash equipment provided. Respiratory system protection: when the dust concentration in the air exceeds the standard, you must wear a self-priming filter dust mask. Emergency rescue or evacuation, should wear air respirator. Eye protection: wear chemical safety goggles. Body protection: wear anti-static overalls. Hand protection: wear chemical protection gloves. Other protection: smoking, eating and drinking are prohibited at the work site. After work, shower and change clothes. Maintain good hygiene habits.

8. physical and chemical properties

appearance and properties: light yellow brittle crystals or powder, with special odor. PH value meaningless melting point (℃):119 boiling point (℃):444.6 relative density (water = 1):2.0 stability: stable forbidden substance: conditions for strong oxidant to avoid contact: decomposition products of heated polymerization hazard: 9. stability of
hydrogen sulfide and sulfur dioxide
and
stability of reactive
: stable polymerization hazard: conditions for non-polymerization to avoid contact: heated forbidden substance: products of strong oxidant combustion (decomposition): 10. toxicological data of hydrogen sulfide and sulfur dioxide



acute toxicity: LD50: no data LC50: no data irritation: rabbit percutaneous open stimulation test: 500mg/24 hours, severe stimulation rabbit eye: 100mg/24 hours, moderate stimulation subacute and chronic toxicity: rat inhalation sulfur dust concentration is 15mg/m3 × 6 hours/day × 5 days/week × 4 weeks weight loss, lung has scattered focal inflammatory cell infiltration mutagenicity: microbial mutagenicity: Salmonella typhimurium 20ul/dish microbial mutagenicity: Escherichia coli 50ul/dish reproductive toxicity: rat inhalation minimum toxic concentration (TCL0):15