氢化钙

Description

Calcium Hydride · CAS 57308-10-8 · CaH2. UNII WY779SQ0XW. Density: 1.7 g/cu cm; Density: 1.7 @25 °C; Other Experimental Properties: Decomposes at 675 °C.

Identification

CAS Registry Number	57308-10-8
PubChem CID	3033859
Molecular formula	CaH2
IUPAC name	calcium hydride
UNII (FDA)	WY779SQ0XW

Computed Descriptors

Molecular Weight	42.09
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	2
Rotatable Bond Count	0
Exact Mass	41.9782409
Monoisotopic Mass	41.9782409
Topological Polar Surface Area	0
Heavy Atom Count	1
Formal Charge	0
Complexity	0

Physical & Chemical Properties

Density	1.7 g/cu cm
Density	1.7 @25 °C
Other Experimental Properties	Decomposes at 675 °C

Physical description & handling notes

• Grayish-colored lump or crystalline solid. Irritating to skin and eyes. Used to make other chemicals.
• Solid; Commercial product is grey; [Merck Index] Greyish solid; [CAMEO] Light grey odorless powder; [Alfa Aesar MSDS]
• Gray orthorhombic crystals or powder
• Grayish-white lumps or crystals
• Pure calcium hydride crystalizes in the form of colorless, hexagonal prisms... Industrial product contains some calcium metal and is consequently grey
• Insoluble in all common inert solvents

GHS Hazard Classification

Reported hazard statements	H260

Documented Uses

• Used to prepare rare metals (reduction of metal oxides) and to generate hydrogen; Also used as a drying agent and in organic syntheses; [Merck Index]
• Metal Extraction and Refining [Category: Industry]
• Reducing agent, drying agent, analytical reagent in organic chemistry, easily portable source of hydrogen, cleaner for blocked-up oil wells
• To prepare rare metals by reduction of their oxides; as a drying agent for liquids and acid esters; to generate hydrogen; ... in organic synthesis
• Calcium hydride is produced industrially by synthesis from the elements /calcium and hydrogen/ at 400 °C and atmospheric pressure ... The reaction is strongly exothermic and is controlled by means of the hydrogen feed rate. The commercial product contains 90-96% CaH2.
• Calcium hydride is prepared on a commercial scale by heating calcium metal to about 300 °C in a high alloy steel, covered crucible under 101 kPa (1 atm) of hydrogen gas. Hydrogen is rapidly absorbed at this temperature and the reaction is exothermic.

Synonyms

CALCIUM HYDRIDE; Calcium dihydride; WY779SQ0XW; CALCIUM HYDRIDE [MI]; 57308-10-8; RefChem:122841; DTXCID8029494; 232-189-2; CALCIUM HYDRIDE (CAH2); DTXSID60894886; EINECS 232-189-2; HSDB 8095; UN1404; UNII-WY779SQ0XW; Calcium hydride (CaT2); 125544-53-8

Frequently Asked Questions

What are the CAS number and molecular formula of Calcium Hydride?

CAS 57308-10-8; molecular formula CaH2; molecular weight — g/mol.

What other names is Calcium Hydride known by?

CALCIUM HYDRIDE, Calcium dihydride, WY779SQ0XW, CALCIUM HYDRIDE [MI], 57308-10-8, RefChem:122841.

Is Calcium Hydride classified as hazardous?

Hazard statements reported: H260.

What are the key physical properties of Calcium Hydride?

Density: 1.7 g/cu cm; Density: 1.7 @25 °C; Other Experimental Properties: Decomposes at 675 °C.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.