Lead (II) Acetate Trihyradrate
Lead(II) acetate(Pb(CH3COO)2), also known as lead acetate, lead diacetate, plumbous acetate, sugar of lead, lead sugar, salt of Saturn, or Goulard's powder, is a white crystalline chemical compound with a sweetish taste. With water, it forms the trihydrate, Pb(CH3COO)2·3H2O, a colourless or white efflorescent monoclinic crystalline substance. The substance is used as a reagent to make other lead compounds and as a fixative for some dyes. In low concentrations, it is the principal active ingredient in progressive types of hair colouring dyes.[6] Lead(II) acetate is also used as a mordant in textile printing and dyeing, and as a drier in paints and varnishes. It was historically used as a sweetener and for cosmetics.
| Pb(C2H3O2)2 | |
| Molar mass | 325.29 g/mol (anhydrous) 379.33g/mol (trihydrate) |
| Appearance | White powder or colourless, efflorescent crystals |
| Odor | Slightly acetic |
| Density | 3.25 g/cm3 (20 °C, anhydrous) 2.55 g/cm3 (trihydrate) 1.69 g/cm3 (decahydrate)[1] |
| Melting point | 280 °C (536 °F; 553 K) (anhydrous) 75 °C (167 °F; 348 K) (trihydrate) decomposes[4] at ≥ 200 °C 22 °C (72 °F; 295 K) (decahydrate)[1] |
| Boiling point | Decomposes |
| Anhydrous: 19.8 g/100 mL (0 °C) 44.31 g/100 mL (20 °C) 69.5 g/100 mL (30 °C)[2] 218.3 g/100 mL (50 °C)[1] |
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| Solubility | Anhydrous and trihydrate are soluble in alcohol, glycerol[2] |
| Solubility in methanol | Anhydrous:[2] 102.75 g/100 g (66.1 °C) Trihydrate:[3] 74.75 g/100 g (15 °C) 214.95 g/100 g (66.1 °C) |
| Solubility in glycerol | Anhydrous:[2] 20 g/100 g (15 °C) Trihydrate:[3] 143 g/100 g (20 °C) |
| −89.1·10−6 cm3/mol | |
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Refractive index(nD)
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1.567 (trihydrate) |