Silver Bromide (AgBr)-Powder

Characteristic

Silver bromide (AgBr), a soft, pale-yellow, water-insoluble salt well known (along with other silver halides) for its unusual sensitivity to light. This property has allowed silver halides to become the basis of modern photographic materials.

Chemical formula：AgBr

Molar mass： 187.77 g/mol

Appearance： Pale yellow solid  photosensitive

Density： 6.473 g/cm3, solid

Melting point： 432 °C (810 °F; 705 K)

Boiling point： 1,502 °C (2,736 °F; 1,775 K) (decomposes)

Solubility in water：0.140 mg/L (20 °C)

Solubility product (Ksp)：5.4 × 10 ⁻¹³

Solubility： insoluble in alcohol, most acids  sparingly soluble in ammonia  soluble in alkali cyanide solutions

Band gap： 2.5 eV

Electron mobility： 4000 cm2/(V·s)

Magnetic susceptibility (χ)：−59.7·10⁻⁶ cm³/mol

Refractive index (nD)：2.253

Application

AgBr is widely used in photographic films and is believed by some to have been used for making the Shroud of Turin.