White crystal or powder; no foul. Soluble in water, very slightly soluble in ethanol, almost insoluble in ether. White hexagonal prismatic crystals,soluble in water (when 0°C 12.54g/100ml water; When 80°C 283g/100ml water), in 33.4°C The maximum solubility of about 28% when the aqueous solution is alkaline. Slightly soluble in alcohol, insoluble in liquid chlorine, ammonia.

White or light yellow crystalline powder , relative density is1.4 . Soluble in water (when20°C, 54g/100ml water; when100°C,81.7g/100ml water), acidic aqueous solution. Soluble in glycerine,slightly soluble in ethanol. Moisture easily decomposed, exposed in the air easily oxidized into sulfate. Exposure to emit sulfur dioxide and acid generated the corresponding salts. Heated to150°C decomposition.

--White orthorhombic crystal. Nonvolatile, nonhygroscopic, smell-less. High stability at normal temperature and can maintain original quality for several years. Freely soluble in water and liquid ammonia, strongly acidic in water solution.
--Slightly soluble in methanol, insoluble in ethanol and ether. Characteristics of double functional group of amidogen and sulphonic radical, may go on chemical

It is non-toxic, non-explosive materials, soluble in water, chloroform, benzene, toluene and other organic solvents, with a lower alcohol, ethylene glycol miscible in any proportion. Use: antirust and corrosion inhibitor, anti-fading for metal product, antiseptic and anticoagulant agent, anti-fogging for photograph, ultraviolet absorbent, anti-freezing agent, cycling cooling water treatment.
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