Sodium perchlorate monohydrate, has the chemical formula NaClO4 · H2O, a molecular weight of 140.46, CAS accession number 7791-07-3, and EINECS accession number 231-511-9. This substance is a colorless orthorhombic crystal with a density of 2.02g/cm ³, a melting point of 130 ℃, and is easily soluble in water, ethanol, and acetone. Its solubility in water is 209g/100mL at 15 ℃ and increases to 284g/100mL at 50 ℃. Drying with concentrated sulfuric acid or above 50 ℃ may result in loss of crystal water, which may cause dangerous reactions when exposed to reducing agents, organic compounds, metal powders, or humid environments. Produced by electrolysis of sodium chlorate solution or crystallization of perchloric acid solution treated with sodium carbonate, the electrolysis requires controlling the current intensity of 1500A and the cell voltage of 5-6V. After crystallization, the old product is dried at 220-230 ℃. Mainly used as raw materials for the preparation of perchloric acid and its salts, applied in the gunpowder industry, analytical reagents, and oxidants. According to UN 1502 5.1/PG 2 classification, it is classified as an oxidant/hazardous irritant and should be stored in a cool and dry place under sealed conditions, following safety regulations S13/S22/S27/336. The oral LD50 of rats is 2100mg/kg, which poses a slight hazard to water bodies.

Specification

Appearance  White powder

NaClO4    ≥99.3%

Chloride (based on NaCl)     ≤0.05%

Chlorate (based onNaClO3)  ≤0.05%

Water insolubles   ≤0.03%

Moisture    ≤0.2%

Application

Used for manufacturing perchloric acid or other perchlorates, and also used in the gunpowder industry.

Nature and stability

If used and stored according to specifications, it will not decompose and should avoid contact with reducing agents, organic materials, metal powders, moisture/dampness. Easy to dissolve in water, 209g soluble in 100cm3 water at 15 ℃, 284g soluble in 100cm3 water at 50 ℃. Soluble in ethanol, density 2.02g/cm3. Dry or heat to 50 ℃ in concentrated sulfuric acid to lose crystal water.

Synthetic method

1. Treat HClO4 aqueous solution with Na2CO3. Crystals precipitate from NaClO4 aqueous solution. In the air, anhydrous NaClO4 gradually absorbs moisture and forms a monohydrate.

2. First, remove impurities such as chromate ions from the saturated sodium chlorate solution with barium hydroxide, filter it, and use it as the electrolyte for electrolysis. Control the current intensity to 1500A, the cell voltage to 5-6V, pH to 6-7, and the electrolyte temperature to 50-70. Stop electrolysis when 92% to 96% of sodium chlorate is converted. Filter the obtained electrolyte, evaporate the filtrate to a slurry, spin dry the obtained crystals, and gradually raise the temperature to 220-230 ℃ for drying, which is the finished product.

Packing

25kg/bag, 22000kg/20"FCL.

Download:  COA of CAS 7791-07-3 Sodium perchlorate monohydrate