Sodium lauroyl sarcosinate
3D model (Jmol)
|Molar mass||293.38 g·mol−1|
|Melting point||140 °C (284 °F; 413 K)|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|what is ?)(|
Sodium lauroyl sarcosinate (INCI), also known as sarkosyl, is an ionic surfactant derived from sarcosine used as a foaming and cleansing agent in shampoo, shaving foam, toothpaste, and foam wash products. In molecular biology experiments, sarkosyl is used to inhibit the initiation of DNA transcription.
This surfactant is amphiphilic due to the hydrophobic 12-carbon chain (lauroyl) and the hydrophilic carboxylate. Since the nitrogen atom is in an amide linkage, the nitrogen is not pH active and is neutrally charged in all aqueous solutions regardless of pH. The carboxylate has a pKa of about 3.6 and is therefore negatively charged in solutions of pH greater than about 5.5.
Addition of an mixture of equal parts of sodium lauroyl sarcosinate and the non-ionic surfactant sorbitan monolaurate (S20) to water led to the formation of micelle-like aggregates, even though neither surfactant formed micelles when present alone. Such aggregates can help carry other small molecules, such as drugs, through the skin.
Sodium lauroyl sarcosinate was sold as a special ingredient called 'Gardol' in Colgate Dental Cream (toothpaste) during the 1950s through the mid-1960s in the US and the mid-1970s in France. Current use as a preventive dentifrice is in Arm & Hammer toothpaste.
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- Akter, N; S. Radiman; F. Mohamed; I.A. Rahman; M.I.H. Reza (2011). "Ternary phase behaviour and vesicle formation of a sodium N-lauroylsarcosinate hydrate/1-decanol/water system". Scientific Reports. 1. doi:10.1038/srep00071. PMC . PMID 22355590.
- Karande, P; A.Jain; A. Arora; M.J.Ho; S. Mitragotri (2007). "Synergistic effects of chemical enhancers on skin permeability: a case study of sodium lauroylsarcosinate and sorbitan monolaurate". Eur. J. Pharm Sci. 31: 1–7. doi:10.1016/j.ejps.2007.01.004.
- Do you remember Gardol? by Olga Werby, May 7, 2013
- 1956 Colgate Toothpaste with Gardol Original Advertisement
- Colgate Dental Cream Gardol Father Kids On Sled 1959 Antique Advertisement
- Colgate Dental Cream with Gardol advertisement in Life Magazine, May 29, 1963 page 4.
- "Clinical Test Confirms Colgate a Leader in Reducing New Cavities! Read what happened when Colgate with Gardol was clinically tested against the most widely accepted fluoride dentifrice." Ebony, June 1963, Vol. 18, No. 8, Colgate with Gardol ad
- Colgate Dental Cream with Gardol advertisement in a TV spot, November 17, 1975.
||This article includes a list of references, but its sources remain unclear because it has insufficient inline citations. (April 2015) (Learn how and when to remove this template message)|
- Ambühl, M; F. Bangerter; P.L. Luisi; P. Skrobal; H.J. Watzke (1993). "Configurational changes accompanying vesiculation of mixed single-chain amphiphiles". Langmuir. 9: 36–38. doi:10.1021/la00025a011.
- Ghosh, S; J.Dey (2011). J. Colloid and Interface Sci. 358: 208–216. Missing or empty
- "Occupational Allergic Contact Dermatitis From Sodium Lauroyl Sarcosinate in Liquid Soap," Zemtsov, Alexander MD, MSC; Fett, Deborah MD, Dermatitis, June 2005, Volume 16, Issue 2, p. 97