Lead(II) acetate

Lead(II) acetate
Skeletal formula of lead(II) acetate
Toxic lead sugar or lead(II) acetate
Names
IUPAC name
Lead(II) acetate
Systematic IUPAC name
Lead(II) ethanoate
Other names
Plumbous acetate, Sugar of Lead, lead diacetate, lead sugar, Salt of Saturn, Goulard's powder
Identifiers
3D model (JSmol)
ChEBI
ChEMBL
ChemSpider
ECHA InfoCard 100.005.551 Edit this at Wikidata
EC Number
  • 206-104-4
MeSH lead+acetate
RTECS number
  • OF8050000
UNII
  • InChI=1S/2C2H4O2.Pb/c2*1-2(3)4;/h2*1H3,(H,3,4);/q;;+2/p-2 ☒N
    Key: GUWSLQUAAYEZAF-UHFFFAOYSA-L ☒N
  • CC(=O)[O-].CC(=O)[O-].[Pb+2]
Properties
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]
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
1.567 (trihydrate)[1]
Structure
Monoclinic (anhydrous, trihydrate)
Rhombic (decahydrate)
Thermochemistry
−960.9 kJ/mol (anhydrous)[2]
−1848.6 kJ/mol (trihydrate)[3]
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 Neurotoxic, probable human carcinogen
GHS labelling:
GHS08: Health hazard GHS09: Environmental hazard[4]
Danger
H360, H373, H410[4]
P201, P273, P308+P313, P501[4]
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 2: Intense or continued but not chronic exposure could cause temporary incapacitation or possible residual injury. E.g. chloroformFlammability 1: Must be pre-heated before ignition can occur. Flash point over 93 °C (200 °F). E.g. canola oilInstability 1: Normally stable, but can become unstable at elevated temperatures and pressures. E.g. calciumSpecial hazards (white): no code
2
1
1
Flash point Non-flammable
Lethal dose or concentration (LD, LC):
400 mg/kg (mice, oral)[1]
300 mg/kg (dog, oral)[5]
Related compounds
Other cations
 Lead(IV) acetate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Lead(II) acetate is a white crystalline chemical compound with a slightly sweet taste. Its chemical formula is usually expressed as Pb(CH3COO)2 or Pb(OAc)2, where Ac represents the acetyl group. Like many other lead compounds, it causes lead poisoning. Lead acetate is soluble in water and glycerin. With water it forms the trihydrate, Pb(OAc)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 formerly served as 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 preservative in wines and in other foods and for cosmetics.

  1. ^ a b c d e Pradyot, Patnaik (2003). Handbook of Inorganic Chemicals. The McGraw-Hill Companies, Inc. ISBN 0-07-049439-8.
  2. ^ a b c d e "Lead(II) acetate". chemister.ru.
  3. ^ a b c "Lead(II) acetate trihydrate". chemister.ru.
  4. ^ a b c d Sigma-Aldrich Co., Lead(II) acetate trihydrate. Retrieved on 2014-06-08.
  5. ^ "Lead compounds (as Pb)". Immediately Dangerous to Life or Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).
  6. ^ "Lead Acetate in 'Progressive' Hair Dye Products". fda.gov. 7 October 2021.