2011年12月2日星期五

Potassium Dichromate preparation and health hazards

By the sodium dichromate (or liquor) and lotion diluted, heated to boiling, add to the theoretical amount of potassium chloride metathesis reaction, a small amount of sodium chlorate, caustic tone with pH 4, then add a small amount of aluminum sulfate to make impurities, flocculation, clarification by separation to remove impurities, the clear liquid cooling and crystallization, solid-liquid separation, washing, drying. Potassium Dichromate for the production of chrome alum, chromium oxide green, chrome yellow, modulation matches medicine head, welding, printing inks, metal passivation. Potassium Dichromate is also used as tanning agents, coloring agents enamel industry, media mordant dyes, synthetic fragrances and organic synthesis oxidant and catalyst. Potassium Dichromate pathways: inhalation, ingestion, absorption through the skin. Health hazards: Acute poisoning: inhalation of Potassium Dichromate can cause acute respiratory tract irritation, epistaxis, hoarseness, nasal mucosa atrophy, and sometimes wheezing and cyanosis. Severe chemical pneumonia can occur. Oral irritation and corrosion of the digestive tract can be caused nausea, vomiting, abdominal pain, bloody stool; severe difficulty in breathing, cyanosis, shock, liver damage and acute renal failure. Chronic effects: contact dermatitis, chrome ulcers, rhinitis, nasal septum perforation, and respiratory tract inflammation
Read more :http://www.chromium-chromium.net/products/Chromate-series/Potassium-Dichromate/

没有评论:

发表评论