Product name Ammonium sulfate

Exports generally include steel grade powder, caprolactam grade small particles, and extruded particles.

Colorless crystals or white particles. Odorless. Decomposes above 280℃. Solubility in water: 70.6g at 0℃, 103.8g at 100℃. Insoluble in ethanol and acetone. The pH of the 0.1 mol/L aqueous solution is 5.5. The relative density is 1.77. The refractive index is 1.521. Ammonium sulfate is mainly used as fertilizer and is suitable for various soils and crops. It can also be used in textiles, leather, medicine, etc.

【Basic information】

【Chemical properties】

The pure product is colorless and transparent orthorhombic crystals, and the aqueous solution is acidic. Insoluble in alcohol, acetone and ammonia. It is hygroscopic, and solidifies into blocks after absorbing moisture. It is completely decomposed into ammonia, nitrogen, sulfur dioxide and water when heated to above 513℃. Reacts with alkalis to release ammonia gas. Reacts with barium chloride solution to produce barium sulfate precipitate. It can also salt out the protein.

【Use】

An excellent nitrogen fertilizer (commonly known as fertilizer powder), suitable for general soil and crops, can make branches and leaves grow vigorously, improve fruit quality and yield, and enhance crop resistance to disasters. It can be used as base fertilizer, top dressing and seed fertilizer, but it can be used for a long time. May cause soil compaction. It can react with salt to produce ammonium chloride, react with aluminum sulfate to produce ammonium alum, and make refractory materials together with boric acid. Adding to the electroplating solution can increase conductivity. It is also a catalyst for food sauce color, a nitrogen source for culturing yeast in the production of fresh yeast, acid dye dyeing auxiliary, and leather deliming agent. In addition, it is also used in beer brewing, chemical reagents and battery production. Another important role is to mine rare earths. Mining uses ammonium sulfate as a raw material, exchanges the rare earth elements in the ore in the form of ion exchange, and then collects the leachate, filters and separates it, and then sun-drys it into a rare earth ore. The production of 1 ton of rare earth ore is about Need 5 tons of ammonium sulfate.

There are also many biological uses, mostly used in protein purification processes, because ammonium sulfate is an inert substance and is not easy to react with other biologically active substances. It can protect protein activity to a greater extent during the purification process. In addition, the solubility of ammonium sulfate Excellent, can form a high-salt environment, prepare for protein precipitation and subsequent high-salt purification. The solubility of ammonium sulfate at zero degrees and 25 degrees at room temperature is quite different. The following is the molar concentration of ammonium sulfate at different saturations at two temperatures.

【Precautions】

Dangerous

Invasion route: inhalation, ingestion, and absorption.

Health hazards: Irritating to eyes, mucous membranes and ~.

Environmental hazards: Long-term use will cause acidification and compaction of the soil.

Explosion hazard: This product is non-flammable and irritating.

first-aid

Contact: Take off contaminated clothing and rinse with plenty of running water.

Eye contact: Lift the eyelid and rinse with running water or saline for at least 15 minutes. Seek medical attention.

Inhalation: Leave the scene to fresh air. If breathing is difficult, give oxygen. Seek medical attention.

Ingestion: Drink enough warm water to induce vomiting. Seek medical attention.

Fire-fighting measures

Hazardous characteristics: Thermal decomposition produces toxic fumes.

Hazardous combustion products: nitrogen oxides, sulfides.

Extinguishing methods: Firefighters must wear full-body fire-proof and gas-proof clothing and put out the fire in the upwind direction. When extinguishing a fire, move the container from the fire scene to an open place as much as possible.

Terms

S16Keep away from sources of ignition.

Keep away from fire.

S36/37Wear suitable protective clothing and gloves.

Wear appropriate protective clothing and gloves.

S45In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)

If an accident occurs or if you feel unwell, seek medical attention immediately (show the label if possible).

S7Keep container tightly closed.

Keep the container tightly closed.

Risk term

R11Highly flammable.

Highly flammable. (Correction: This product is non-flammable)

R23/24/25Toxic by inhalation, in contact with skin and if swallowed.

Toxic by inhalation, contact and swallowing.

Leakage emergency treatment

Emergency treatment: Isolate the contaminated area and restrict access. It is recommended that emergency treatment personnel wear dust masks (multi-faceted covers) and protective clothing. Use a clean shovel to collect in a dry, clean, covered container, and transfer to a place. If there is a large amount of leakage, collect it for recycling or transport it to a waste disposal site for disposal.

Operation, disposal and storage

Operation precautions: Airtight operation, local exhaust. Operators must undergo special training and strictly abide by operating procedures. It is recommended that operators wear self-priming filter dust masks, chemical-protective glasses, anti-poison penetration overalls, and rubber gloves. Avoid generating dust. Avoid contact with acids and alkalis. When handling, load and unload with care to prevent damage to packaging and containers. Equipped with leakage emergency treatment equipment. Empty containers may be harmful residues.

Storage precautions: Store in a cool, ventilated warehouse. Keep away from fire and heat sources. It should be stored separately from acids and alkalis, and avoid mixed storage. The storage area should be equipped with suitable materials to contain the leakage.