Lead Stearate
Time: 2012-10-01 16:08:30
Lead Stearate
Synonyms
Lead(2+) octadecanoate;
Stearic acid, lead salt;
Octadecanoic acid, lead salt;
Category
Anionic Surfactant
>> Carboxylate
>> Chain Carboxylate
>> Alkyl Carboxylate
>> Linear Alkyl Carboxylate
Chemical Numbering System
CASRN1072-35-1
EINECS214-005-2
Molecular Formula & Molecular Weight
Molecular Formula: C36H70PbO4; C36H72O4.Pb
Molecular Weight: 774.14
Structure
 
Properties
Appearance    (1), white powder.
Solubility    insoluble in water. soluble in toluene.
Hygroscopicity    hygroscopic.
Stability    stable.
Risk    Solid form: toxic, flammable material; irritation, irritation to skin, eye, respiratory system. Harmful products of combustion are CO, CO2 and so on. Contact with strong oxidants, can cause to burn.
GHS (Rev.6) label:   
Ecology    be hazardous to environment. Water body should be given special attention.
Biodegradability    biodegradable.
Characteristics    excellent lubricating, emulsifying, dispersing abilities.
Synthesis
Sodium stearate reacts with lead nitrate or lead acetate solution, then obtain.
Quality Standards & Test Methods
1. Physical and chemical indexes
Item
Physical and chemical indexes
Solid
Actives, %, ≥
95.0
Pb, %
 
Test Methods
(1), Actives
GB/T 13173 Surface active agents - Detergents - Testing methods
GB/T 5173 Surface active agents and detergents-Determination of anionic-active matter by direct two-phase titration procedure
ISO 2271 Surface active agents -- Detergents -- Determination of anionic-active matter by manual or mechanical direct two-phase titration procedure
(2), Pb
Safety and Technical Standards for Cosmetics (2015 Edition)
GB/T 30799 The test method of food detergents - Determination of heavy metals
HG 2337 Lead stearate (light)
2. Hazardous substances indexes
Item
Hazardous substances indexes
Solid
As, mg/Kg, ≤
3
Test Methods
(1), As
Safety and Technical Standards for Cosmetics (2015 Edition)
GB/T 30797 The test method of food detergents - Determination of total arsenic
3. Product standards
(1), Chinese standards
(1a), HG 2337 Lead stearate (light)
4. Further explanation
(a), On physical and chemical indexes: firstly, shall be indicated carbon atom distribution; secondly, shall be indicated average molecular weight.
Major Uses
1. Typical applications
Use as lubricant.
Use as emulsifying agent, dispersing agent.
2. Plastics
Heat stabilizers, lubricants in polyethylene processing.
Good light stability.
Thermal stability is better than calcium stearate.
Mainly used for opaque rigid PVC products.
Especially suitable for wire and cable materials, can be given to excellent electrical properties.
3. Coatings
Drier, flatting agent in paint.
4. Lubricating
Use as grease thickening agent, lubricant.
Manufacturers
 
Update: 20131102(1); 20171215(2);