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Hafnium

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Chemical's truth
Ricin is a natural poison extracted from the castor oil bean with a quoted LD50 of 20,000 ng/kg.


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Hydrogen bromide

(anhydrous hydrobromic acid)

CAS no: 10035-10-6   Formula: HBr   Molecular weight: 80.912

Physical Data

Appearance: Colorless gas, corrosive, nonflammable with pungent odor.

Melting point: -86.80°C
Boiling point: -66.38°C

Density: 3.307 g/L
Solubility: 600 cm3 per cm3 H2O (0°C)


Thermodynamic Data (gas phase)

Enthalpy of formation: -36.3 kJ/mol
Gibbs energy of formation: -53.4 kJ/mol

Entropy: 198.7 J/mol K
Heat capacity: 29.1 J/mol K


Production and preparation


Behavior and Chemical Properties


History and Uses


Hazard, Storage and Handling

(Last update: February 2003)


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