化合物详情

INHALATION OF VAPOR BY LABORATORY WORKERS IN CLOSED SPACE LED TO BRONCHIAL IRRITATION /& CHARACTERISTIC MERCURY POISONING SYMPTOMS/ ... CHRONIC MERCURIALISM IN FUR-CUTTING & FELT-HAT INDUSTRIES /IS REPORTED/. ALTHOUGH MERCURIC NITRATE WAS MATERIAL USED TO TREAT FUR FROM WHICH FELT WAS MADE, MERCURY WAS GRADUALLY RELEASED FROM FUR & FELT IN FORM OF METALLIC MERCURY VAPOR. ... THE WORKERS HAD MIXED EXPOSURE TO DUST OF MERCURY CMPD (ESP THE NITRATE) & TO VAPOR OF ELEMENT. ... POISONING WAS SIMILAR TO THAT OBSERVED ... /WITH/ METALLIC MERCURY ONLY.

Common symptoms include peripheral neuropathy (presenting as paresthesia or itching, burning or pain), skin discoloration (pink cheeks, fingertips and toes), edema (swelling), and desquamation (dead skin peels off in layers). Nitrate and nitrite poisoning causes methemoglobinemia. Symptoms include cyanosis, cardiac dysrhythmias and circulatory failure, and progressive central nervous system (CNS) effects. CNS effects can range from mild dizziness and lethargy to coma and convulsions. (L1137, A5)

Mercury poisoning is treated by immediate decontamination and chelation therapy using DMSA, DMPS, DPCN, or dimercaprol. Methemoglobinemia can be treated with supplemental oxygen and methylene blue 1% solution administered intravenously slowly over five minutes followed by IV flush with normal saline. Methylene blue restores the iron in hemoglobin to its normal (reduced) oxygen-carrying state. (L1613, A7)

LD50: 170 mg/kg (Oral, Mouse) (L444) LD50: 5 mg/kg (Intraperitoneal, Mouse) (L444)

Mercury mainly affects the nervous system. Exposure to high levels of metallic, inorganic, or organic mercury can permanently damage the brain, kidneys, and developing fetus. Effects on brain functioning may result in irritability, shyness, tremors, changes in vision or hearing, and memory problems. Acrodynia, a type of mercury poisoning in children, is characterized by pain and pink discoloration of the hands and feet. Mercury poisoning can also cause Hunter-Russell syndrome and Minamata disease. Nitrate and nitrite poisoning causes methemoglobinemia. Nitrites may cause pregnancy complications and developmental effects. They may also be carcinogenic. (L1137, L7)

Reproductive Toxin - A chemical that is toxic to the reproductive system, including defects in the progeny and injury to male or female reproductive function. Reproductive toxicity includes developmental effects. See Guidelines for Reproductive Toxicity Risk Assessment.

Oral (L7); inhalation (L7); dermal (L7)

High-affinity binding of the divalent mercuric ion to thiol or sulfhydryl groups of proteins is believed to be the major mechanism for the activity of mercury. Through alterations in intracellular thiol status, mercury can promote oxidative stress, lipid peroxidation, mitochondrial dysfunction, and changes in heme metabolism. Mercury is known to bind to microsomal and mitochondrial enzymes, resulting in cell injury and death. For example, mercury is known to inhibit aquaporins, halting water flow across the cell membrane. It also inhibits the protein LCK, which causes decreased T-cell signalling and immune system depression. Mercury is also believed to inhibit neuronal excitability by acting on the postsynaptic neuronal membrane. It also affects the nervous system by inhibiting protein...

Chronic Inhalation: 0.0002 mg/m3 (L134)

Ingested nitrate or nitrite under conditions that result in endogenous nitrosation is probably carcinogenic to humans (Group 2A). Inorganic mercury compounds are not classifiable as to their carcinogenicity to humans (Group 3). (L135)