Sodium bisulfite is an inorganic compound, white crystalline powder, odor of sulfur dioxide, mainly used as bleach, preservative, antioxidant, bacterial inhibitor. Used in food industry, pharmaceutical field, industrial application, agriculture, environmental protection field.

Melting point:150℃    

Water soluble:300g/L

Density :1.48 g/cm³   

Appearance:white crystalline powder

Chemical formula: NaHSO3   

Molecular weight:104.061

CAS login number: 7631-90-5 

Security description: S25:S26; S39:S46

Sodium sulfite, is a kind of inorganic substance, is sodium sulfite, mainly used as artificial fiber stabilizer, fabric bleaching agent, photographic developer, dye bleaching deoxidizer, fragrance and dye reducing agent, lignin removal agent for papermaking.

Water solubility: 

Density:2.63 g/cm3

Chemical formula :Na2SO3  

Security description:S24/25

Molecular weight : 126.043 

Danger symbol: Xn

CAS login number: 7757-83-7

Sodium metabisulfite (Na2S2O5) is an inorganic compound with a white or yellow crystal appearance and a strong pungent odor. Soluble in water, the aqueous solution is acidic, and contact with strong acids releases sulfur dioxide and generates the corresponding salts. In the air for a long time, it is oxidized into sodium sulfate, so sodium metabisulfite can not be long.

Melting point: >170 °C (starting at 150 °C)

Other name: Sodium pyrosulfite   

Water solubility: soluble (54 g/100 ml)

Chemical formula :Na2S2O5    

Density: 1.48g /cm3

Molecular weight :190.09    

Appearance: White to light yellow crystals with pungent 

CAS number :7681-57-4    

Use: Antioxidant

EINECS number :231-673-0  

Cautionary terms R: R22, R31, R41 

Sulfur alias sulfur, colloidal sulfur, sulfur block. The appearance is light yellow brittle crystal or powder, with special odor, volatile, slightly soluble in ethanol, ether, easily soluble in carbon disulfide. As a flammable solid, sulfur is mainly used in the manufacture of dyes, pesticides, matches, gunpowder, rubber, rayon and so on. Sulfur is an important variety of inorganic pesticides. The sulfur water suspension is slightly acidic, insoluble in water, and reacts with alkali to form many hydrophobic compounds. Sulfur burns with a cyan flame and produces sulfur dioxide gas. In production, sulfur is often processed into colloidal suspension for the prevention and control of pests and diseases, which is safe for people and animals and is not easy to cause drug damage to crops.

CAS login number: 7704-34-9

Melting point: 114°C  

Boiling point: 444.6°C 

Chemical formula: S     

Flash point: 168 °C

Molecular weight: 32.06 

Steam pressure: 0.13kPa

Mineral density: 2.36

Water soluble: soluble in carbon disulfide, insoluble in water

It is classified as a salt, not a base. Also known as soda or soda ash in international trade. It is an important inorganic chemical raw material, mainly used in the production of flat glass, glass products and ceramic glaze. It is also widely used in life washing, acid neutralization and food processing, etc. It is a basic chemical raw material, and is widely used in medicine (medical treatment of excessive stomach acid), paper making, metallurgy, glass, textile, dyes and other industries, and is used as a starter in food industry.

Melting point: 851℃

Alias: Sodium carbonate 

Molecular weight: 105.99

CAS number: 497-19-8   

Chemical formula: Na2C03

EINECS number: 207-838-8:231-867-5 

Boiling point: 1600°C

Density: 2.532g/cm³  

Decomposition temperature: 1744℃

Sodium sulfide is also known as smelly alkali, smelly soda, yellow alkali, alkali sulfide. Sodium sulfide is an inorganic compound, and pure sodium sulfide is a colorless crystalline powder. Strong moisture absorption, soluble in water. The aqueous solution has a strong alkaline reaction. Contact with skin and hair can cause burns. So sodium sulfide is commonly known as alkali sulfide. Sodium sulfide aqueous solutions oxidize slowly in air to sodium thiosulfate, sodium sulfite, sodium sulfate, and sodium polysulfide. Due to the rapid formation of sodium thiosulfate, the main product of oxidation is sodium thiosulfate. Sodium sulfide deliqueses in the air, carbonates and deteriorates, and continuously releases hydrogen sulfide gas. Industrial sodium sulfide due to impurities in its color is pink, brown red, earth yellow. Specific gravity, melting point, boiling point, also vary due to the influence of impurities.

Name: Sodium sulfide melting point: 950°C

Other name: anhydrous sodium sulfide, yellow tablets 

Water solubility: 186 g/L (20℃) 

Chemical formula: Na2S   

Density: 1.86

olecular weight: 78.04 

PH value: 12

CAS: Login number 1313-82-2