Sodium Sulfide/Sodium Monosulfide

Molecular Formula:

NA2S

GRADE:

60%, 98%

NET WT:

25KG

FOB Price:

PORT:

Shanghai, Tianjin, Qingdao

Molecular formula: Na2S

Molecular weight: 78.04

CAS No.: 1313-82-2

Risk category: Category 8.2 corrosives presenting alkalinous properties (containing crystal water ≥ 30%)
Category 4.2 spontaneously combustible articles (anhydrous or containing crystal water < 30%)

UN No.: 1385 (anhydrous or containing crystal water < 30%);
1849 (including crystal water ≥ 30%)

Physical and chemical properties

Appearance and properties: Colorless or beige granular crystal; the industrial products are reddish brown or brick red block

Solubility: Soluble in water, insoluble in ether, slightly soluble in ethanol

Melting point/℃: 1180

Critical temperature/℃:

Relative density (water=1): 1.86

Boiling point/℃: No data

Critical pressure/MPa: Meaningless

Relative density (air=1): No data

Minimum ignition energy/mJ:

Saturated steam pressure/kPa: (℃)

Heat of combustion/( kJ·mol-1):

Risk of combustion and explosion

Flammability: Flammable

Flash point/℃: Meaningless

Polymerization hazard: No polymerization

Ignition temperature/℃: No data

Explosion limit/%: No data

Stability: Stable

Explosive substance level and group:

Incompatible materials: Acids and strong oxidants

Hazardous characteristics: Anhydrous substances are spontaneously combustible article, and their dust is prone to spontaneous combustion in the air. Decompose in acid and release highly toxic flammable gas. The powder and the air can form explosive mixture. Its aqueous solution is corrosive and strongly irritating. Start to evaporate at 100℃, and the vapor can corrode the glass.

Fire extinguishing methods: Firefighters shall wear full-body acid and alkali-resistant fire-fighting suits and air breathing apparatus to put out the fire. Move the container from the fire scene to an open place as much as possible. Keep fire containers cool by spraying water until the fire is over. It is not allowed to use acid-base fire extinguishing agents. Fire extinguishing agents: Water, spray water, sand.

Toxicity

Invading way: Inhalation, ingestion.
Toxicity: Moderately toxic
Acute toxicity: LD50 208mg/kg (rat oral)

Harm to human body

This product can decompose hydrogen sulfide in the gastrointestinal tract and cause hydrogen sulfide poisoning after oral administration. Corrosive to skin and eyes.

First aid

Skin contact: Immediately remove contaminated clothes and flush with a large amount of running water for 20~30min. If you feel unwell, seek medical advice. Eye contact: Immediately separate the eyelids, and rinse thoroughly with a large amount of running water or normal saline for 10~15 minutes. If you feel unwell, seek medical advice. Inhalation: Quickly leave the site to a place with fresh hair. Keep the respiratory tract unblocked. Have oxygen therapy if breathing is difficult. In case breathing or heartbeat stops, immediately perform cardiopulmonary resuscitation. Seek medical advice. Ingestion: Rinse mouth with water and then drink plenty of water. Do not induce vomiting. Seek medical advice.

Protection

Engineering control: Enclosed operation. Provide safety shower and eye bath facility. Respiratory protection: Filter type dust respirator must be worn in case of exposure to its dust. Eye protection: Wear chemical safety glasses. Body protection: Wear acid and alkali-resistant rubber suits. Hand protection: Wear acid and alkali-resistant rubber gloves. Others: No smoking, eating or drinking at working site, and wash hands before meals.

Spillage treatment

Isolate the contaminated spill area and restrict access. Eliminate all ignition sources. It is recommended that the handler should wear dust masks, acid and alkali-resistant suits, and acid and alkali-resistant rubber gloves. Do not touch broken containers and spills without wearing appropriate protective suit. Cut off sources of leaks as much as possible. Cover spills with plastic cloth to reduce scattering. Prevent water from entering the packaging container. Collect spills with a clean shovel and put in a clean and dry container with a loose lid and move the container away from the spill area.

Storage and transportation

Store in a cool and well-ventilated warehouse. Keep away from fire and heat sources. Seal the package. It shall be stored separately from oxidants and acids, and mixed storage shall not be allowed. It shall not be stored for a long time to avoid deterioration.