Seeking advice humbly: the decomposition of sodium thiocyanate

Is no one willing to help? I’ll handle it myself

Forms yellow sodium cyanosulfate with concentrated sulfuric acid

Sodium thiocyanate MSDS (found online) 1. Identification: Chinese name: Sodium thiocyanate; English name: sodium thiocyanate; Molecular formula: CNS.Na; Relative molecular mass: 81; CAS number: 540-27-7. Hazard category: Chemical category: II. Main components and properties: Main component: pure substance; Appearance and properties: colorless crystals or white powder, colorless. Primary uses: It is used as a solvent in the production of acrylic fibers, as well as in the preparation of setting solutions, and in industries such as dyeing and pharmaceuticals. 3. Health hazards: Routes of exposure: inhalation or skin contact. Health hazards: This product causes severe irritation to mucous membranes, the upper respiratory tract, eyes, and skin. Occupational poisoning is rare. It is mainly caused by accidental ingestion. In cases of acute poisoning due to high doses, it causes gastrointestinal disorders such as nausea, vomiting, abdominal pain, and diarrhea, as well as fluctuations in blood pressure and a reduced heart rate. Xanthopsia may occur. Severe poisoning can cause significant damage to kidney function. Chronic exposure can suppress thyroid function. It can prolong a woman’s menstrual period and increase its volume. IV. First aid measures: Skin contact: Immediately remove the contaminated clothing, rinse with running water or 5% sulfur solution, and then wash with running water. Eye contact: Lift the eyelids and rinse with flowing water or saline. Seek medical attention. Inhalation: Quickly leave the area and go to a place with fresh air. Seek medical attention. Ingestion: Drink plenty of warm water, induce vomiting, and wash the stomach with a 1:5000 potassium permanganate solution or a 5% sodium thiosulfate solution. Seek medical attention. 5. Combustion and Fire-Fighting Properties: Flammability: This product is non-flammable. Flash point (°C): Meaningless. Lower explosion limit (%): Meaningless. Ignition temperature (°C): Meaningless. Maximum explosion percentage (%): Meaningless. Minimum ignition energy (mJ): Meaningless. Maximum explosion pressure (MPa): Meaningless. Hazardous properties: Decomposes when heated, releasing toxic gases such as nitrogen and sulfur oxides. Fire extinguishing method: Firefighters must wear full-body fire and poison-resistant suits and extinguish the fire from the upwind side. When extinguishing a fire, move the container away from the fire site to an open area as much as possible. 6. Emergency response to leaks: Isolate the area contaminated by the leak and restrict access. It is recommended that emergency responders wear dust masks (full-face masks) and standard work clothing. Avoid dust; sweep carefully, place it in a bag, and transfer it to a safe location. In the event of a large spill, cover it with plastic sheeting or canvas. Collect and recycle, or transport to waste disposal sites for disposal. 7. Precautions for storage and transportation: Operate in a sealed environment with thorough ventilation. Operators must receive specialized training and strictly adhere to the operating procedures. It is recommended that operators wear self-priming filter dust masks. Avoid generating dust. Avoid contact with acids and alkalis. Handle with care during transportation to prevent damage to the packaging and containers. Equipped with leak emergency response equipment. Empty containers may still contain harmful substances. 8. Protective Measures: Workshop hygiene standards: China’s MAC (mg/m3): No standard established. Former Soviet Union MAC (mg/m3): No standard established. Respiratory protection: When there is a possibility of exposure to toxic substances, a powered air-purifying respirator with a hood must be worn. It is recommended to wear a self-contained breathing apparatus during emergency rescue or evacuation. Eye protection: Wear chemical safety goggles if necessary. Body protection: Wear standard work protective clothing. Hand protection: Wear general-purpose protective gloves. Others: Once done, take a shower and change. Store the clothes contaminated with toxins separately and wash them before using them again. 9. Physical and chemical properties: Melting point (°C): 287. Boiling point (°C): No data available. Relative density (water = 1): 1.73. Relative density (air = 1): No data available. Saturated vapor pressure (kPa): No data available. Logarithm of the octanol/water partition coefficient: No data available. Heat of combustion (kJ/mol): No data available. Critical temperature (°C): No data available. Critical pressure (MPa): No data available. Solubility: Soluble in water and ethanol. 10 Stability and Reactivity Stability: Polymerization hazards: Conditions to avoid contact with: Light. Prohibited substances: Acids, strong bases. Combustion (decomposition) products: Eleven. Toxicological data: Acute toxicity: LD50: 600 mg/kg (oral, in mice) ； 770 mg/kg (oral, rats) LC50: No data available. Environmental data: This substance may be harmful to the environment; special attention should be paid to water bodies. 13. Disposal: Relevant ** and local regulations should be consulted prior to disposal. After neutralization, dispose of it by safe burial. 14. Transport Information: Hazard Code: No information available. UN Number: No information available. Packaging Classification: Z01. Packaging Mark: No information available. Packaging Method: No information available

What is the amount of sodium thiocyanate to use? Purpose?