Wood's metal ( Lipowitz's alloy : Bendalloy ) 70-72C - 10g

Wood's Metal

Other Names: Lipowitz's Alloy, Bendalloy
Melting Point Range: 70–72 °C
Appearance: Silvery-gray, brittle metal alloy
CAS Number: Mixture (contains bismuth, lead, tin, cadmium)
Molar Mass: Not applicable (alloy)

Chemical Composition (Typical)

Note: Some modern variations may reduce or eliminate cadmium due to toxicity concerns.

Physical and Chemical Properties

• Density: ~9.7 g/cm³

• Melting Point: 70–72 °C (low melting alloy)

• Boiling Point: Not applicable (individual components decompose)

• Solubility: Insoluble in water; reacts with strong acids

• Thermal Conductivity: Moderate

• Electrical Conductivity: Lower than pure metals

• Odor: Odorless

Applications

• Safety Devices: Used in fire suppression systems, thermal fuses, and sprinkler heads

• Mold Making: Ideal for casting delicate parts due to low melting point

• Electronics: Serves as a heat-transfer or soldering medium

• Scientific Demonstrations: Often used in thermal expansion and melting point experiments

• Machining Fixtures: Used for holding parts without applying heat

Safety Information

Signal Word: ⚠️ Danger

Hazard Statements

• H302: Harmful if swallowed

• H373: May cause damage to organs through prolonged or repeated exposure (due to lead and cadmium content)

• H410: Very toxic to aquatic life with long-lasting effects

Precautionary Statements

• P260: Do not breathe dust or fumes

• P273: Avoid release to the environment

• P280: Wear protective gloves/protective clothing/eye protection

• P314: Get medical advice if you feel unwell

• P501: Dispose of contents/container in accordance with local hazardous waste regulations

Handling and Storage

• Handling: Use in a well-ventilated area or under a fume hood, especially when heating

• Storage: Store in a dry, well-ventilated space in a tightly closed container, away from acids and oxidizers