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Lithium hydride

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Lithium hydride

EINECS 231-484-3
CAS No. 7580-67-8 Density 0.82 g/cm3
Solubility reacts with water Melting Point 680 °C(lit.)
Formula HLi Boiling Point
Molecular Weight 7.95 Flash Point
Transport Information UN 1414 4.3/PG 1 Appearance white to grey powder
Safety 16-26-27-36/37/39-7/8-45-25 Risk Codes 14-34-25-14/15
Molecular Structure Molecular Structure of 7580-67-8 (Lithium hydride (LiH)) Hazard Symbols FlammableF,CorrosiveC,ToxicT
Synonyms

Lithiumhydride;Lithium monohydride;

 

Lithium hydride Chemical Properties

Empirical Formula: HLi
Molecular Weight: 7.9489 g/mol
EINECS: 231-484-3
Density: 0.82 g/mL at 25 °C(lit.)
Vapour Pressure: 0.00856 mmHg at 25 °C
Boiling Point: 150 °C
Melting point: 680 °C(lit.)
Storage tempreture: Water-free area
Water solubility: Reacts
Solubility: Soluble in water
Sensitive: Air & Moisture Sensitive
Appearance: White to grey powder
Structure of Lithium hydride (CAS NO.7580-67-8):
               
Product Category: Materials for Hydrogen Storage;Metal Hydrides;Reduction;Synthetic Reagents

Lithium hydride Uses

 Lithium hydride(CAS NO.7580-67-8) is used as place the military on the hydrogen source, reducing agent in organic synthesis.

Lithium hydride Production

In the oven, take lithium into the tube made by stainless steel, sealed and vacuum, and then pass into the hydrogen . When the hydrogen pressure is 1 atm, and the temperature is 725 °C,  maintainning for 15h. while continuing to pass the case of hydrogen to carry out cooling, remove reactant from the oven into the bottle sealed with nitrogen. The product should be stored in the dark. Its
                                  2 Li + H2 → 2LiH

Lithium hydride Toxicity Data With Reference

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
dog LCLo inhalation 110mg/m3/1H (110mg/m3) SENSE ORGANS AND SPECIAL SENSES: OTHER CHANGES: OLFACTION

BEHAVIORAL: CONVULSIONS OR EFFECT ON SEIZURE THRESHOLD

CARDIAC: EKG CHANGES NOT DIAGNOSTIC OF ABOVE
"Spravochnik po Toksikologii i Gigienicheskim Normativam Vol. -, Pg. 150, 1999.
human TDLo inhalation 200ug/m3 (0.2mg/m3) SENSE ORGANS AND SPECIAL SENSES: OTHER CHANGES: OLFACTION

SENSE ORGANS AND SPECIAL SENSES: OTHER: EYE

BLOOD: OTHER CHANGES
"Spravochnik po Toksikologii i Gigienicheskim Normativam Vol. -, Pg. 150, 1999.
rabbit LCLo inhalation 110mg/m3/1H (110mg/m3) SENSE ORGANS AND SPECIAL SENSES: OTHER CHANGES: OLFACTION

BEHAVIORAL: CONVULSIONS OR EFFECT ON SEIZURE THRESHOLD

CARDIAC: EKG CHANGES NOT DIAGNOSTIC OF ABOVE
"Spravochnik po Toksikologii i Gigienicheskim Normativam Vol. -, Pg. 150, 1999.
rabbit LD50 intravenous 20mg/kg (20mg/kg)   "Spravochnik po Toksikologii i Gigienicheskim Normativam Vol. -, Pg. 150, 1999.
rabbit LD50 subcutaneous 44600ug/kg (44.6mg/kg)   "Spravochnik po Toksikologii i Gigienicheskim Normativam Vol. -, Pg. 150, 1999.
rat LCLo inhalation 10mg/m3/4H (10mg/m3) LUNGS, THORAX, OR RESPIRATION: COUGH AMA Archives of Industrial Health. Vol. 14, Pg. 468, 1956.
rat LD50 oral 77500ug/kg (77.5mg/kg)   "Spravochnik po Toksikologii i Gigienicheskim Normativam Vol. -, Pg. 150, 1999.
rat LD50 subcutaneous 50mg/kg (50mg/kg)   "Spravochnik po Toksikologii i Gigienicheskim Normativam Vol. -, Pg. 150, 1999.

Lithium hydride Consensus Reports

Reported in EPA TSCA Inventory. EPA Extremely Hazardous Substances List.

Lithium hydride Safety Profile

Poison by inhalation. A severe eye, skin, and mucous membrane irritant. Upon contact with moisture, lithium hydroxide is formed. The LiOH formed is very caustic and therefore highly toxic, particularly to lungs and respiratory tract, skin, and mucous membranes. The powder ignites spontaneously in air. The solid can ignite spontaneously in moist air. Mixtures of the powder with liquid oxygen are explosive. Ignites on contact with dinitrogen oxide, oxygen + moisture. To fight fire, use special mixtures of dry chemical. See also LITHIUM COMPOUNDS and HYDRIDES.
Hazard Codes: F,C,T
Risk Statements: 14-34-25-14/15
R14: Reacts violently with water
R34: Causes burns
R25: Toxic if swallowed
R14/15: Reacts violently with water, liberating extremely flammable gases
Safety Statements: 16-26-27-36/37/39-7/8-45-25
S16: Keep away from sources of ignition - No smoking
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
S27: Take off immediately all contaminated clothing
S45: In case of accident or if you feel unwell, seek medical advice immediately (show label where possible)
S25: Avoid contact with eyes
S36/37/39: Wear suitable protective clothing, gloves and eye/face protection
S7/8: Keep container tightly closed and dry

Lithium hydride Standards and Recommendations

OSHA PEL: TWA 0.025 mg/m3
ACGIH TLV: TWA 0.025 mg/m3
DFG MAK: 0.025 mg/m3
DOT Classification:  4.3; Label: Dangerous When Wet

Lithium hydride Specification

 Lithium hydride , its cas register number is 7580-67-8. It also can be called Hydrure de lithium ; and Lithium monohydride . Lithium hydride(7580-67-8) is the compound of lithium and hydrogen. It is a colourless crystalline solid, although commercial samples appear gray. With a molecular mass of slightly less than 8, it is the lightest ionic compound.
 It is hazardous, so the first aid measures and others should be known. Such as: When on the skin: first, should flush skin with plenty of water immediately for at least 15 minutes while removing contaminated clothing. Secondly, get medical aid. Or in the eyes: Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Then get medical aid soon. While, it's inhaled: Remove from exposure and move to fresh air immediately. Give artificial respiration while not breathing. When breathing is difficult, give oxygen. And as soon as to get medical aid. Then you have the ingesting of the product: If victim is conscious and alert, give 2-4 cupfuls of milk or water.
In addition, Lithium hydride (CAS NO.7580-67-8) is not compatible with strong oxidizing agents, acids, alcohols, oxygen, chlorine, and you must not take it with incompatible materials, light, ignition sources, exposure to air, exposure to moist air or water. And also prevent it to broken down into hazardous decomposition products: hydrogen gas, lithium hydroxide.

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