Anhydrous zinc sulfate is a colorless crystalline solid. Zinc sulfate is also obtained as a hexahydrate, ZnSO4.6H2O, and as a heptahydrate ZnSO4.7H2O. All forms are soluble in water. All are noncombustible. The primary hazard is the threat posed to the environment. Immediate steps should be taken to limit its spread to the environment. It is used in the production of rayon, as a feed supplement, and as a fertilizer ingredient.
颜色/状态:
Colorless, orthorhombic crystals
稳定性/保质期:
There is ... /a/ tendency for solutions of zinc sulfate to form slight cloudiness due to seperation of basic salt formed through partial hydrolysis.
Zinc can enter the body through the lungs, skin, and gastrointestinal tract. Intestinal absorption of zinc is controlled by zinc carrier protein CRIP. Zinc also binds to metallothioneins, which help prevent absorption of excess zinc. Zinc is widely distributed and found in all tissues and tissues fluids, concentrating in the liver, gastrointestinal tract, kidney, skin, lung, brain, heart, and pancreas. In the bloodstream zinc is found bound to carbonic anhydrase in erythrocytes, as well as bound to albumin, _2-macroglobulin, and amino acids in the the plasma. Albumin and amino acid bound zinc can diffuse across tissue membranes. Zinc is excreted in the urine and faeces. (L49)
Anaemia results from the excessive absorption of zinc suppressing copper and iron absorption, most likely through competitive binding of intestinal mucosal cells. Unbalanced levels of copper and zinc binding to Cu,Zn-superoxide dismutase has been linked to amyotrophic lateral sclerosis (ALS). Stomach acid dissolves metallic zinc to give corrosive zinc chloride, which can cause damage to the stomach lining. Metal fume fever is thought to be an immune response to inhaled zinc. (L48, L49, A49)
CLASSIFICATION: D; not classifiable as to human carcinogenicity. BASIS FOR CLASSIFICATION: Based on inadequate evidence in humans and animals. HUMAN CARCINOGENICITY DATA: Inadequate. ANIMAL CARCINOGENICITY DATA: Inadequate. /Zinc and compounds/
来源:Hazardous Substances Data Bank (HSDB)
毒理性
致癌物分类
对人类不具有致癌性(未被国际癌症研究机构IARC列名)。
No indication of carcinogenicity to humans (not listed by IARC).
Chronic exposure to zinc causes anemia, atazia, lethargy, and decreases the level of good cholesterol in the body. It is also believed to cause pancreatic and reproductive damage. (L49)
◉ Summary of Use during Lactation:Zinc is a normal component in human milk. Typical daily doses of 15 mg or less of oral zinc from prenatal vitamins or other multimineral supplements do not alter milk zinc levels in lactating women. Mothers may therefore take zinc supplementation during lactation to achieve the recommended daily intake of 12 to 13 mg. Daily oral doses between 15 and 25 mg have negligible effects on milk zinc levels.
Sublingual zinc lozenges and nasal sprays used to prevent or treat adult viral upper respiratory tract infections have not been studied during lactation. Maternal use of these remedies several times daily for short time periods, as they are typically intended to be used, would not be expected to cause harm to the breastfed infant.
Zinc deficiency in exclusively breastfed infants, whether due to inadequate maternal zinc status or to infant premature birth or other causes, should be treated with direct zinc supplementation of the infant.
Pasteurization by the Holder method does not change the concentration of zinc in milk.
◉ Effects in Breastfed Infants:Zinc deficiency in exclusively breastfed infants can occur. Clinical features include facial and groin rash, diarrhea, hair loss, disinterest in feeding, and failure to thrive. One known cause is below-normal milk zinc levels due to maternal genetic mutations affecting mammary zinc transport proteins. Zinc deficiency may also occur in infants born very preterm who are not supplemented with special human milk fortifiers designed for premature babies. With both causes, direct administration of zinc drops to the infant quickly corrects the deficiency and alleviate the infant’s symptoms.
Acrodermatitis enteropathica is a congenital zinc deficiency disorder caused by genetic mutations affecting the infant’s intestinal zinc transporter proteins. Breastmilk is protective against this disorder, which typically develops after weaning from breastmilk feeding. Resuming breastmilk feeding, if possible, and direct infant supplementation with zinc drops are the recommended treatments.
◉ Effects on Lactation and Breastmilk:Relevant published information was not found as of the revision date.
Approximately 20 to 30% of dietary zinc is absorbed, primarily from the duodenum and ileum. The amount absorbed is dependent on the bioavailability from food. Zinc is the most bioavailable from red meat and oysters. Phytates may impair absorption by chelation and formation of insoluble complexes at an alkaline pH. After absorption, zinc is bound in the intestine to the protein metallothionein. Endogenous zinc can be reabsorbed in the ileum and colon, creating an enteropancreatic circulation of zinc.
来源:DrugBank
吸收、分配和排泄
消除途径
主要存在于粪便中(大约占90%);较少存在于尿液和汗液中。
Primarily fecal (approximately 90%); to a lesser extent in the urine and in perspiration.
After absorption zinc is bound to protein metallothionein in the intestines. Zinc is widely distributed throughout the body. It is primarily stored in RBCs, WBCs, muscles, bones, Skin, Kidneys, Liver, Pancreas, retina, and prostate.
The pharmacokinetics of zinc sulfate were compared with those of a new zinc pantothenate, in rabbits. Each salt was administered to rabbits at a dosage of 3.3 uCi of zinc-65/kg of body weight. The measured pharmacokinetics of the two compounds responded to a two compartment open model. The urinary elimination of the two salts was similar, as was their localization in the skin and fur, but Zn pantothenate was retained by the liver to a lesser extent than was zinc sulfate (ZnSO4).
来源:Hazardous Substances Data Bank (HSDB)
吸收、分配和排泄
吸收:20%至30%。蛋白质结合:99%。消除:通过小肠排泄。
Absorption: 20% to 30%. Protein binding: 99%. Elimination: Through small bowel excretion.
The isothermal decomposition of metal sulphate powders in high vacuum
作者:Edmund Gimzewski、Peter A.H. Wyatt
DOI:10.1016/0040-6031(81)80034-2
日期:1981.3
Abstract The isothermaldecomposition of MSO 4 powder (M = Cu 2+ , Ni 2+ , Zn 2+ ) in a highvacuum was studied by following the mass of 40 mg samples in a small platinum cup. The respective rate equations are d w /d t = k 1 , d w /d t = k 2 , d w /d t = k 3 w −1 , where w is weight loss and t is time, and the activation enthalpies are 262 ± 10 kJ mole −1 , 260 ± 21 kJ mole −1 , and 238 ± 14 kJ mol
摘要 通过在小铂杯中跟踪 40 mg 样品的质量,研究了 MSO 4 粉末(M = Cu 2+ 、Ni 2+ 、Zn 2+ )在高真空下的等温分解。各自的速率方程为 dw /dt = k 1 、dw /dt = k 2 、dw /dt = k 3 w -1 ,其中 w 为重量损失,t 为时间,活化焓为 262 ± 10 kJ 摩尔 - 1、260 ± 21 kJ mol -1 和238 ± 14 kJ mol -1 。观察了分解的形态,并讨论了它们与物理测量的相关性。
Chemical immobilization of enzymes
申请人:Owens-Illinois, Inc.
公开号:US03933589A1
公开(公告)日:1976-01-20
Disclosed is a method for chemically immobilizing enzymes on a support to form a biologically active composite having prolonged service life by using a preformed reaction solution of an alkane dihalide and an alkane diamine for the chemical immobilization.
SINGLE POT PROCESS FOR PREPARING METAL PICOLINATES FROM ALPHA PECOLINE
申请人:——
公开号:US20020177584A1
公开(公告)日:2002-11-28
The present invention relates to a single pot process for the preparation of metal picolinates useful as dietary supplement from alpha picoline, said process comprising hydrosulphonation of alpha picoline with sulphuric acid; heating the reaction mixture thus obtained between the range of 150° to 210 ° C. followed by oxidation with any suitable oxidizing agent to obtain alpha picolinic acid sulphate, and treating the thus obtained alpha picolinic acid sulphate with a metal salt solution to obtain corresponding metal picolinate.
Process for preparing metal salts of alkyl phosphates
申请人:Sakai Chemical Industry Company, Ltd.
公开号:US04163018A1
公开(公告)日:1979-07-31
A process for preparing metal salts of alkyl phosphate of either one of the formulae: ##STR1## WHICH COMPRISES REACTING AN ALKYL PHOSPHATE OF EITHER ONE OF THE FORMULAE: ##STR2## in the form of its alkali metal salt with a metal salt of the formula: M.sub.n X.sub.m in an aqueous medium at a temperature of from about 50.degree. to 80.degree. C. (wherein R is an alkyl group of not less than 12 carbon atoms, M is an alkaline earth metal, aluminum or zinc, X is halogen ion, sulfate ion or nitrate ion, l is an integer corresonding to the atomic valency of M, r is an integer of 0, 1 or 2, m is an integer of 1, 2 or 3 and n is an integer of 1 or 2).
Apparatus and method for ammonia removal from waste streams
申请人:——
公开号:US20010033816A1
公开(公告)日:2001-10-25
Apparatus, materials, and methods for removing ammonia from fluids using metal hydroxides (e.g. zinc hydroxide) and metal loaded media (e.g. zinc loaded ion exchange resins); the metal hydroxides and metal loaded media may be regenerated with a weak acid (pK
a
between 3 and 7). Alternatively, ammonia is removed from fluids by using H2SO4 and ZnSO4 and metal loaded media; the metal loaded media may be regenerated with H2SO4 and ZnSO4; the ammonia containing H2SO4 and ZnSO4 may be concentrated as necessary to form (NH
4
)2SO
4
.ZnSO
4
.6H
2
O (ammonium zinc sulfate hexahydrate) crystals. These crystals are removed from the mother liquor and heated to temperatures exceeding 200° C. releasing NH
3
and H
2
O vapor upon the decomposition of the crystals.