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Lead acetate trihydrate
1. Basic Information
Name: Lead acetate trihydrate
Alias: Trihydrated lead(II) acetate, Sugar of lead
CAS No.: 6080-56-4
Molecular Formula: C4H12O7Pb
Molecular Weight: 379.33
Category: Heavy metal analytical reagent, electroplating raw material, ceramic glaze additive, textile mordant, laboratory lead ion standard reagent
2. Physical and Chemical Properties
Physical Properties
- Appearance: Colorless transparent crystalline flake or white crystal
- Odor: Odorless, slight sweet taste
- Solubility: Freely soluble in water, glycerol; soluble in dilute ethanol; insoluble in absolute ethanol, ether
- Melting Point: 75 °C (loses crystal water)
- Predicted Density: 2.55 g/cm3
- Hygroscopy: Slightly efflorescent in dry air; deliquescent under high humidity
- Aqueous property: Weakly acidic aqueous solution; easy to form basic lead acetate precipitate when encountering carbon dioxide in air
Chemical Properties
- Molecular structure: Divalent lead combined with two acetate radicals, carrying three crystal water molecules
- Dehydration characteristic: Heating above 75 °C gradually loses crystal water to form anhydrous lead acetate; decomposed above 200 °C to release acetic acid and lead oxide
- Ion reaction: Pb2+ reacts with sulfate, chloride, sulfide to generate insoluble lead salt precipitates; can form complex with excess acetate
- Photostability: Light-sensitive; long-term light exposure turns gray due to partial reduction to elemental lead
- Thermal stability: Stable at room temperature sealed state; high temperature decomposes to release irritating acetic acid fumes and toxic lead-containing dust
- Compatibility: Compatible with weak acid aqueous solution; incompatible with alkalis, sulfides, sulfate, strong oxidants
3. Main Application Fields
1. Chemical Analysis Laboratory Reagent (Core Application)
Standard lead ion reagent for precipitating sulfide, chromate; used for qualitative and quantitative detection of sulfate, chromate in water and raw materials
2. Electroplating & Metal Surface Treatment
Electroplating auxiliary for lead plating; passivation brightener for steel and aluminum alloy surface
3. Ceramic & Glass Industrial Additive
Glaze fluxing agent, improves glaze smoothness and luster; raw material for low-temperature colored glass
4. Textile Dyeing Mordant
Mordant for fabric dyeing and printing, enhances dye adhesion on fiber
5. Industrial Desiccant & Catalyst
Organic synthesis mild catalyst, leather tanning auxiliary
4. Quality Specification Table
| Test Item | Standard Specification |
| CAS Number | 6080-56-4 |
| Molecular Formula | C4H12O7Pb |
| Appearance | Colorless transparent crystal without gray discoloration |
| Assay (Pb(CH3COO)2·3H2O) | ≥99.0% |
| Water Insoluble Matter | ≤0.01% |
| Chloride (Cl) | ≤0.002% |
| Iron (Fe) | ≤0.001% |
| Copper (Cu) | ≤0.0005% |
| Packaging | Sealed plastic bottle; bulk 25kg lined PE woven bag |
| Storage Condition | Hermetically sealed cool dry warehouse below 25 °C, light shielding, isolated from food, feed and acidic/alkaline chemicals |
| Transportation Requirement | Toxic heavy metal hazardous goods, Class 6 toxic substance transport standard, strictly separated from food, daily necessities |
| Shelf Life | 24 months under intact sealed packaging |
