天堂网亚洲,天天操天天搞,91视频高清,菠萝蜜视频在线观看入口,美女视频性感美女视频,95丝袜美女视频国产,超高清美女视频图片

ChemicalBook--->CAS DataBase List--->7693-27-8

7693-27-8

7693-27-8 Structure

7693-27-8 Structure
IdentificationBack Directory
[Name]

Magnesium hydride
[CAS]

7693-27-8
[Synonyms]

MgH2
MAGNESIUM HYDRIDE
Dihydridemagnesium
agnesiumhydride,98%
magnesium dihydride
Magnesium hydride,90%
MagnesiuM hydride(MgH2)
MAGNESIUMHYDRIDE-NI-DOPED
Dihydrogen magnesium salt
MagnesiuM hydride, 90% 50GR
Magnesium hydride hydrogen, storage grade
MAGNESIUM HYDRIDE, 90% (REMAINDER MAGNESIUM)
[EINECS(EC#)]

231-705-3
[Molecular Formula]

H2Mg
[MDL Number]

MFCD00011101
[MOL File]

7693-27-8.mol
[Molecular Weight]

26.32
Chemical PropertiesBack Directory
[Appearance]

Magnesium hydride is a coarse, gray crystalline solid.
[Melting point ]

>250°C (dec.)
[density ]

1.45
[storage temp. ]

water-free area
[solubility ]

reacts with H2O
[form ]

white tetragonal crystals
[color ]

white tetragonal crystals, crystalline
[Sensitive ]

Moisture Sensitive
[EPA Substance Registry System]

Magnesium hydride (MgH2) (7693-27-8)
Hazard InformationBack Directory
[Chemical Properties]

Light grey powder
[General Description]

Magnesium hydride is a white crystalline solid. Magnesium hydride reacts violently with water and may ignite upon contact with air. Magnesium hydride is used to make other chemicals.
[Air & Water Reactions]

Highly flammable. Pyrophoric, ignites spontaneously in air and forms magnesium oxide and water [Merck 11th ed. 1989]. Reacts with water to form caustic solution of magnesium hydroxide and hydrogen gas (H2) and heat sufficient to ignite the evolved hydrogen [Merck 11th ed. 1989].
[Reactivity Profile]

Hydrides, such as Magnesium hydride, are reducing agents and react rapidly and dangerously with oxygen and with other oxidizing agents, even weak ones. Thus, they are likely to ignite on contact with alcohols. Hydrides are incompatible with acids, alcohols, amines, and aldehydes.
[Health Hazard]

Inhalation or contact with vapors, substance or decomposition products may cause severe injury or death. May produce corrosive solutions on contact with water. Fire will produce irritating, corrosive and/or toxic gases. Runoff from fire control may cause pollution.
[Fire Hazard]

Produce flammable gases on contact with water. May ignite on contact with water or moist air. Some react vigorously or explosively on contact with water. May be ignited by heat, sparks or flames. May re-ignite after fire is extinguished. Some are transported in highly flammable liquids. Runoff may create fire or explosion hazard.
[Potential Exposure]

Used in hydrogen production and in production of magnesium alcoholates.
[First aid]

If this chemical gets into the eyes, remove any contact lenses at once and irrigate immediately for at least 15 minutes, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts the skin, remove contaminated clothing and wash immediately with soap and water. Seek medical attention immediately. If this chemical has been inhaled, remove from exposure, begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR if heart action has stopped. Transfer promptly to a medical facility. When this chemical has been swallowed, get medical attention. Give large quantities of water and induce vomiting. Do not make an unconscious person vomit
[Shipping]

UN2010 Magnesium hydride, Hazard Class: 4.3; Labels: 4.3-Dangerous when wet material.
[Incompatibilities]

A strong reducing agent. Pyrophoric: the powder or dust may ignite spontaneously in air, or in the presence of moisture. Contact with water or steam forms magnesium hydroxide, flammable hydrogen gas, and enough heat to ignite the hydrogen. Violent reaction with oxidizers, alcohols, halogens, chlorinated solvents. Incompatible with strong acids, acid chlorides, alcohols, amines and aldehydes. Store under nitrogen. Decomposes @ 280C in high vacuum
[Description]

MgH2 contains 7.66% by weight of hydrogen and has been studied as a potential hydrogen-storage medium. It was discovered in 1912, during the pyrolysis of ethyl magnesium iodide (a Grignard reagent), which produced small amount of MgH2. In 1951, preparation from the elements was first reported involving direct hydrogenation of Mg metal at high pressure and temperature (200 atmospheres, 500°C)with magnesium iodide as a catalyst:
Mg+H2→MgH2
Lower temperature production from Mg and H2 using nano-crystalline Mg produced in ball mills has been investigated. Other preparations include:
1. The hydrogenation of magnesium anthracene under mild conditions:
Mg(anthracene)+H2→MgH2+C14H10 2. The reaction of diethyl magnesium with LiAlH4
3. An adduct of complexed MgH2, e.g. MgH2·THF by the reaction of phenylsilane (C6H8Si) and dibutyl magnesium in ether or hydrocarbon solvents in the presence of THF (C4H8O) using TMEDA (Tetramethylethylenediamine=(CH3)2NCH2CH2N (CH3)2) as a ligand.
[Uses]

Magnesium hydride contains a high proportion of hydrogen (7.65 wt %), which can be liberated by heat. The catalytically produced compound displays rapid rates of hydrogenation and dehydrogenation and it is therefore of interest as a hydrogen reservoir. The high activity of catalytically produced magnesium hydride also enables it to take part in an addition reaction with 1-alkenes to form organomagnesium compounds:
MgH2+2 CH2 = CHR→Mg(CH2CH2R)2
These dialkylmagnesium compounds have become industrially important in the production of very active Ziegler catalysts. The Mg – H2 system can also be used for the simultaneous removal and purification of pure hydrogen from gas mixtures. Magnesium hydride is also used as a drying agent for organic solvents and gases and in chemical syntheses.
[Production Methods]

Magnesium hydride is synthesized industrially from the elements at 300 – 400 ℃ and 10 – 15 MPa hydrogen pressure in a rotary autoclave provided with steel grinding balls:
Mg+H2→MgH2
The commercial product is gray due to the presence of impurities, being about 97 % pure (Ventron). Less drastic reaction conditions are required when a homogeneous catalyst is used. The hydrogenation can be carried out at 60 – 70 ℃and 8 MPa in THF in the presence of halides of chromium, titanium, or iron and magnesium – anthracene complex. In contrast to the product from an uncatalyzed synthesis, this has a high specific surface area (90 m2 /g compared with 0.5 m2 /g), and is very reactive and pyrophoric.
[storage]

Color Code—Red Stripe: Flammability Hazard:Store separately from all other flammable materials. Storeunder nitrogen in tightly closed containers in cool (decomposes .250℃), well-ventilated area. Keep containers dry atall times. Magnesium hydride reacts violently with water,releasing caustic material, heat, and flammable gas. Sourcesof ignition, such as smoking and open flames, are prohibited where magnesium hydride is handled, used, or stored.
Safety DataBack Directory
[Hazard Codes ]

F,Xi
[Risk Statements ]

15-11-36/37/38
[Safety Statements ]

8-43A-43-36/37/39-26-16-7
[RIDADR ]

2010
[TSCA ]

No
[HazardClass ]

4.3
[PackingGroup ]

I
[HS Code ]

28500090
7693-27-8 suppliers list
Company Name: Hangzhou FandaChem Co.,Ltd.
Tel: +8615858145714 , +8615858145714
Website: www.fandachem.com/
Company Name: Hubei Jusheng Technology Co.,Ltd.
Tel: 18871490254
Website: www.hubeijusheng.com
Company Name: Hubei xin bonus chemical co. LTD
Tel: 86-13657291602
Website: www.approvedhomemanagement.com/ShowSupplierProductsList1549548/0.htm
Company Name: Antai Fine Chemical Technology Co.,Limited
Tel: 18503026267 , 18503026267
Website: www.approvedhomemanagement.com/ShowSupplierProductsList1980510/0.htm
Company Name: ANHUI WITOP BIOTECH CO., LTD
Tel: +8615255079626 , +8615255079626
Website: www.approvedhomemanagement.com/showsupplierproductslist418627/0_en.htm
Company Name: PT CHEM GROUP LIMITED
Tel: +86-85511178; +86-85511178; , +86-85511178;
Website: http://www.approvedhomemanagement.com/manufacturer/henan-lihao-chem-plant-25020/
Company Name: LEAPCHEM CO., LTD.
Tel: +86-852-30606658
Website: www.leapchem.com
Company Name: Shanghai Likang New Materials Co., Limited
Tel: +86-16631818819 +86-17736933208 , +86-17736933208
Website:
Company Name: ABCR GmbH & CO. KG
Tel: 49 721 95061 0
Website: www.abcr.de
Company Name: Mainchem Co., Ltd.  
Tel: +86-0592-6210733
Website: https://www.mainchem.com
Company Name: Chemwill Asia Co.,Ltd.  
Tel: 86-21-51086038
Website: www.chemwill.com
Company Name: Wuhan kemike Biomedical Technology Co., Ltd  Gold
Tel: 13163388153 13163388153
Website: www.kemike888.com/
Company Name: Wuhan lanabai Pharmaceutical Chemical Co., Ltd  Gold
Tel: 15307151931
Website: http://www.lullabypharm-chem.com
Company Name: Wuhan kemike Biomedical Technology Co., Ltd  Gold
Tel: 027-87747081 18186681184
Website: http://www.approvedhomemanagement.com/supplier/23247121/
Company Name: Wuhan canos Technology Co., Ltd  Gold
Tel: 153-37111468 15337111468
Website: http://www.approvedhomemanagement.com/supplier/24787017/
Company Name: Jiangsu Raien Environmental Protection Technology Co., Ltd  Gold
Tel: 0513-0513-66814573 16651336298
Website: www.approvedhomemanagement.com/supplier/25814899/
Company Name: Meryer (Shanghai) Chemical Technology Co., Ltd.  
Tel: 021-61259108 18621169109
Website: https://www.meryer.com/cn/index/
Company Name: Alfa Aesar  
Tel: 400-6106006
Website: http://chemicals.thermofisher.cn
Tags:7693-27-8 Related Product Information
676-58-4 677-22-5 693-04-9 925-90-6 1068-55-9 75-16-1 1826-67-1 100-58-3 100-59-4 2386-64-3 6921-34-2 3761-92-0