Sodium nitrite 99% Rhombic crystal or powder white or yellowish

Sodium nitrite, is a kind of inorganic compounds, chemical formula for NaNO2, for the white crystalline powder, soluble in water, slightly soluble in ethanol, methanol, ether, mainly used for the manufacture of azo dyes, also can be used as fabric dyeing mordant, bleach, metal heat treatment agent.

Rhombic crystal or powder white or yellowish. It has a salty taste and resembles salt in appearance. Relative density 2.168; Melting point 271℃, at 320℃ decomposition into oxygen, nitrogen, nitrogen oxide and sodium oxide. Hygroscopic, easily soluble in water, stable in aqueous solution. Slightly soluble in methanol, ethanol, ether. Can absorb oxygen from the air, and form NaNO3. The dew is slowly oxidized to NaNO3 in the air. Contact with organic matter is easy to occur combustion and explosion, combustion release toxic nitrogen oxide gas.

NaN02 is an oxidizing corrosion inhibitor suitable for water treatment with low or ultra-low hardness. This product is toxic, so it is mainly used for closed circulating cooling water system, is a dangerous corrosion inhibitor, when the use concentration is insufficient, not only no corrosion inhibition, but accelerate corrosion, the use concentration is usually 300 ~ 500mg/L. The best pH range of water quality is 8-10, and is often used together with 300 ~ /L Na2 C03. Water pH<6, decomposition, not corrosion inhibition. Often combined with sodium molybdate, on the one hand to play a synergistic effect, on the other hand to reduce the amount of both. Only applicable to black metal rust prevention, copper and other non-ferrous metal ineffective, even corrosive effect.