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Sodium Steaoryl Glutamate
"Descrizione"
by Ark90 (12417 pt)
2023-Oct-16 19:02

Review Consensus: 10 Rating: 10 Number of users: 1
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Sodium Steaoryl Glutamate is a chemical compound, amino acid, anionic surfactant, which can be obtained from L-glutamic acid and palm acid, animals or other chemical compounds or synthesised by acylation and neutralisation of stearic acid and glutamate.  It has good biodegradability.

The name describes the structure of the molecule:

  • Sodium. It's an alkali metal that provides the "sodium" component to the compound. It often acts as a pH adjuster or as a stabilizing agent in many formulations.
  • Stearoyl. Derived from stearic acid, a saturated fatty acid. This part of the molecule can act as an emulsifier, helping to mix water-based and oil-based ingredients.
  • Glutamate. Derived from glutamic acid, an amino acid. In this form, it can act as a surfactant or as a skin conditioning agent.

Raw Materials Used in Production.

  • Stearic Acid: a long-chain fatty acid typically derived from animal fats or vegetable oils.
  • Monosodium Glutamate: sodium salt of glutamic acid.

Step-by-step Summary of Industrial Production Process.

  • Extraction of Stearic Acid. Typically obtained through hydrolysis of animal fats or vegetable oils.
  • Esterification Reaction. Stearic acid is reacted with glutamic acid in the presence of an esterification agent to form the stearoyl ester.
  • Formation of Salt. The stearoyl ester reacts with a sodium solution to form sodium stearoyl glutamate.
  • Purification. The compound is purified through methods like crystallization, filtration, or distillation.

It appears as a white powder.

What it is used for and where

Cosmetics

It is included in oil/water formulations of creams and personal care products as an emulsifying agent, conditioning agent, dispersing agent with the ability to control the crystallisation process. Emulsifiers have the property of directly influencing the stability, sensory properties and surface tension of sunscreens, modulating their filmometric performance. 

Usage: 5% - 35%.

Detergents and cleaners

Used in the field of household detergents as a stain remover and emulsifier.

Industrial cleaning

Used in the field of industrial cleaning as a stain remover, rust inhibitor

Typical commercial product characteristics Sodium Stearoyl Glutamate

AppearanceWhite powder
Assay93% min
pH5.0-7.0
Boiling Point600.3ºC at 760mmHg
Flash Point316.8ºC
PSA112.85000
LogP5.06020
Acid (mgKOH/g)95-130
Nacl3.0% max
Loss on drying4.0% max
Heavy Metal (Pb)10ppm max
Water≤5.0%
As2ppm max
Safety



  • Molecular FormulaC23H42NNaO5
  • Molecular Weight     435.6
  • Exact Mass   434.28800
  • CAS  38517-23-6
  • UNII    65A9F4P024
  • EC Number   253-980-9
  • DSSTox Substance ID  
  • IUPAC  sodium;(4S)-5-hydroxy-4-(octadecanoylamino)-5-oxopentanoate
  • InChI=1S/C23H43NO5.Na/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-21(25)24-20(23(28)29)18-19-22(26)27;/h20H,2-19H2,1H3,(H,24,25)(H,26,27)(H,28,29);/q;+1/p-1/t20-;/m0./s1 
  • InChl Key      QKHBMQWPOUUMQZ-BDQAORGHSA-M
  • SMILES   CCCCCCCCCCCCCCCCCC(=O)NC(CCC(=O)[O-])C(=O)O.[Na+]
  • MDL number  
  • PubChem Substance ID    

Synonyms:

  • L-Glutamic acid, N-(1-oxooctadecyl)-, monosodium salt
  • sodium hydrogen N-(1-oxooctadecyl)-L-glutamate
  • L-Glutamic acid, N-(1-oxooctadecyl)-, sodium salt (1:1)
  • sodium;(4S)-5-hydroxy-4-(octadecanoylamino)-5-oxopentanoate

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