First, the toxicity of vanadium
The toxicity of vanadium is closely related to its valence and water solubility. High-valence vanadium is easily soluble in water and is highly toxic. Atmospheric vanadium compounds have a stimulating effect on the skin and respiratory tract. Long-term exposure to V 2 O 5 dust and V 2 O 5 thick environment can cause respiratory irritation accompanied by mucus production, bronchitis, chest pain, dermatitis and the like.
Second, the environmental safety indicators of vanadium
For a place where 8 hours of work per day and 40 hours of work per week, the upper limit of vanadium-containing dust is 0.5 mg/m3, and the upper limit of fine dust environment should be 0.05 mg/m3. The upper limit for short-term workers is 1.5 mg/m3. The toxicity of vanadium compounds is listed in Table 1.
Table 1 Toxicity of vanadium compounds
Compound | Oral and lethal dose of kilograms of body weight LD 50 (14d)/mg | Inhaled lethal dose LD 50 (14d) / (mg · L - 1 ) | Kilogram weight epidermal lethal dose LD 50 (14d)/mg | |||
male | female | male | female | male | female | |
Analytical pure V 2 O 5 | 470 | 467 | 11.09 | 4.3 | >2500 | >2500 |
Industrial pure V 2 O 5 | 8713 | 5639 | >6.65 | >6.65 | >2500 | >2500 |
Ammonium metavanadate | 218 | 141 | 2.61 | 2.43 | >2500 | >2500 |
Potassium metavanadate | 318 | 314 | 1.85 | 4.16 | >2500 | >2500 |
From a biological point of view, vanadium is a very important element. It is known that vanadium contributes to the function of biological nitrogen fixation. Due to the discovery of vanadium halide peroxidase in seaweed, it has ignited a boom in its research. Because it can form an intermediate of enzyme-vanadium hydrochloride, vanadate is The cells are easily reduced to a tetravalent state and exist as VO 2 + . In the extracellular, animal body fluids, it is easily oxidized by air to pentavalent, and exists as VO 3 - . Vanadium in the cell can promote the phosphorylation and de-phosphorylation of cellular process, control the activity of many enzymes, and participate in the regeneration of free radicals.
It is believed that vanadium has an anticancer effect in the body. Studies have shown that glutathione S-transferase (CST) is a detoxification enzyme for cancer. In the screening of trace element feeding experiments, drinking water containing NH 4 VO 3 in the mucosa of the liver and kidney of the test mouse, It was found that the activities of glutathione and CST were significantly improved, and thus vanadium was considered to have an anticancer effect.
Description:
Formic ACID is one of the most powerful organic acids. It is a colourless liquid with pungent odour and strongly caustic.
Uses:
Used as rubber coagulant;reducing agent in textile dyeing and printing industries;foodstuff preservatives and raw material in pharmaceutical industry.
Application:
a. Pharmaceutical industry Caffeine, Analgin, Aminopyrine, Vitamin B1,etc.
b. Pesticide industryTriazolone, Disinfest, etc.
c. Chemical industryMethane amide, DMF, Age resister, etc.
d. Leather industryTanning, etc.
e. Textile industryNatural Rubber.
f. Rubber industryCoagulation, etc. medicine
g. Steel industryAcid cleaning of steel production, etc.
h. Paper industry Pulp manufacturing, etc.
i. Food industry Disinfectant, etc.
j. Poultry industrySilage, etc.
Storage:
Store in cool place. Keep container tightly closed in a dry and well ventilated place. Containers which are opened must be carefully resealed and kept upright to prevent leakage.
Formic Acid,Methanoic Acid,Formic Acid Ants,Anhydrous Formic Acid
HENAN JINHE INDUSTRY CO.,LTD , https://www.hncarbonblack.com