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Accelerators & Retarders-11%
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Sodium Sulphide
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Sodium Sulphide (Na₂S) is a yellow to red-yellow crystalline solid or powder with a characteristic odor of hydrogen sulfide. It is highly soluble in water, forming strongly alkaline solutions. This 25kg packaged product is widely used in the chemical, leather, pulp and paper, and textile industries as a reducing agent, sulfur donor, and in flotation processes. Due to its strong reducing properties and reactivity, it must be handled with care under proper safety measures.
Description
Sodium Sulphide
Primary Uses
- Leather Industry
- Dehairing Agent: Used in the liming and dehairing steps of leather processing to remove hair and other unwanted components.
- Tanning Agent: Facilitates sulfide tanning processes.
- Pulp & Paper Industry
- Kraft Pulping: Acts as a reducing agent and chemical in the kraft process to break down lignin and facilitate pulp production.
- Deinking Process: Used to remove inks and other contaminants from recycled paper.
- Chemical Industry
- Sulfur Source: Provides sulfide ions for the synthesis of various sulfur-containing chemicals.
- Flotation Agent: Used in mineral processing to separate ores via flotation techniques.
- Redox Reactions: Employed as a reducing agent in organic and inorganic chemical syntheses.
- Textile Industry
- Bleaching and Dyeing: Used in vat dyeing and as a bleaching agent to remove excess dye.
- Reducing Agent: Maintains reducing environments during dyeing processes.
- Water Treatment
- Oxygen Scavenger: Removes dissolved oxygen from boiler water to prevent corrosion.
- Environmental Applications
- Wastewater Treatment: Used to precipitate heavy metals and neutralize acidic wastes.
Secondary Uses
- Pharmaceutical Industry
- Intermediate: Used in small quantities for synthesis of some pharmaceutical compounds.
- Mining Industry
- Ore Processing: Employed in the flotation and extraction of sulfide ores.
- Laboratory & Research
- Reagent: Utilized as a reducing agent in various analytical and synthetic procedures.
KEY PRODUCT FEATURES
1. Basic Identification Attributes
- Chemical Name (IUPAC): Sodium sulfide
- Common/Trade Name: Sodium sulphide, Sodium sulfide nonahydrate (if hydrated)
- CAS Number: 1313-82-2
- HS Code: 2830.20.00
- Synonyms: Sodium sulfide, Disodium sulfide, Sodium sulfide hydrate (depending on form)
2. Physical & Chemical Properties
- Physical State: Yellow to red-yellow crystalline solid or powder
- Color & Odor: Yellow; strong odor of H₂S (hydrogen sulfide)
- Solubility: Highly soluble in water, releasing alkaline and sulfide ions
- Density: 1.856 g/cm³ (anhydrous)
- Melting Point: 1180 °C (decomposes)
- pH (aqueous solution): Strongly alkaline (pH ~11-14)
- Appearance: Crystalline or granular solid, hygroscopic
3. Safety & Hazard Attributes
- GHS Classification:
- Acute Toxicity (Oral) Category 4
- Skin Corrosion/Irritation Category 1B
- Serious Eye Damage/Eye Irritation Category 1
- Acute Toxicity (Inhalation) Category 3
- Hazardous to the Aquatic Environment (Chronic) Category 2
- Toxicity: LD₅₀ (oral, rat) ~ 207 mg/kg
- Exposure Limits: OSHA PEL: 5 mg/m³ (as sulfide dust/mist)
- Corrosivity: Strongly corrosive to skin and eyes
- Odor Warning: Emits toxic and flammable hydrogen sulfide gas when exposed to moisture or acids
4. Storage & Handling Attributes
- Storage Conditions: Store in a cool, dry, well-ventilated area away from moisture, acids, and oxidizers
- Container Type: 25kg HDPE drums or lined bags, tightly sealed
- Shelf Life: 12 months under proper storage
- Handling Precautions: Use personal protective equipment; avoid contact with skin, eyes, and inhalation; store separately from acids and moisture sources
5. Regulatory & Compliance Attributes
- REACH Registered
- Complies with OSHA Hazard Communication Standard
- UN Number: UN 1829 (Sodium Sulfide, solid, toxic)
- Transport Classification: Class 6.1 Toxic substances
6. Environmental & Health Impact
- Biodegradability: Not biodegradable
- Ecotoxicity: Toxic to aquatic life; LC₅₀ (fish) approx. 10 mg/L
- Bioaccumulation: Not expected
- Aquatic Impact: Harmful if released into water bodies
SAFETY HANDLING PRECAUTIONS
Safety Handling Precautions
- PPE Required: Chemical-resistant gloves, goggles, face shield, respiratory protection in dusty or fume conditions
- Handling Guidelines: Use in well-ventilated areas; avoid moisture contact; use spill containment measures
- Storage Measures: Keep containers tightly closed; isolate from incompatible substances
First Aid Measures
- Inhalation: Move to fresh air immediately; seek urgent medical attention for breathing difficulties
- Skin Contact: Rinse immediately with plenty of water for at least 15 minutes; remove contaminated clothing; seek medical help
- Eye Contact: Rinse thoroughly with water for at least 15 minutes; get immediate medical attention
- Ingestion: Do not induce vomiting; rinse mouth and seek immediate medical attention
Firefighting Measures
- Fire Hazards: May release toxic hydrogen sulfide gas when exposed to acids or moisture
- Extinguishing Media: Use water spray, dry chemical, or foam; avoid dry powders that react violently
- Hazardous Combustion Products: Hydrogen sulfide (H₂S), sulfur oxides (SOx)
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