Span® 20

Sorbitan laurate, Sorbitan monolaurate
CAS Number:
EC Number:
MDL number:
PubChem Substance ID:

Quality Level




≥44% (GC)

mol wt

346.47 g/mol

SMILES string




InChI key


Related Categories

General description

Span 20 is a co-surfactant.


Span 20 has been used in a study to assess enhanced solubility and oral bioavailability of itraconazole. It has also been used in a study to investigate the oxidation of unsaturated lipids in oil-in-water emulsions.


1 L in glass bottle
250 mL in glass bottle

Other Notes

Fatty acid composition: Lauric acid (C12:0) ≥ 44%; balance primarily myristic (C14:0), palmitic (C16:0) and linolenic (C18:3) acids.

Legal Information

Span is a registered trademark of Croda International PLC

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves


NONH for all modes of transport

WGK Germany


Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

Certificate of Origin

Claire Berton et al.
Journal of colloid and interface science, 377(1), 244-250 (2012-04-25)
The development of lipid oxidation in oil-in-water (O/W) emulsions is widely influenced by the properties of the interfacial layer, which separates the oil and water phases. In this work, the effect of the structure of the interface on the oxidative...
Muhammad Moniruzzaman et al.
Journal of colloid and interface science, 352(1), 136-142 (2010-09-10)
In this paper, we report a novel ionic liquid-in-oil (IL/o) microemulsion which is able to dissolve pharmaceuticals that are insoluble or sparingly soluble in water and most of pharmaceutical grade organic liquids. Towards this approach, the nanometer-sized ionic liquid droplets...
Yung-Chih Kuo et al.
Colloids and surfaces. B, Biointerfaces, 76(1), 286-291 (2009-12-17)
This study analyzes the effects of Tween 80 and Span 20 on the electrical interaction between cationic solid lipid nanoparticles (CSLNs) and human brain microvascular endothelial cells (HBMECs). Electrophoretic mobility, zeta potential and fixed charge density of CSLNs and HBMECs...
Muhammad Moniruzzaman et al.
International journal of pharmaceutics, 400(1-2), 243-250 (2010-09-04)
Pharmaceutical industries have posed challenges in the topical and transdermal administration of drugs which are poorly soluble or insoluble in water and most of organic solvents. In an approach to overcome this limitation, ionic liquid-in-oil (IL/o) microemulsions (MEs) were employed...
Pankaj Karande et al.
European journal of pharmaceutical sciences : official journal of the European Federation for Pharmaceutical Sciences, 31(1), 1-7 (2007-03-21)
Certain mixtures of chemicals are known to synergistically enhance skin permeability to drugs. Here, we report on the transport enhancing properties of mixtures of an anionic surfactant, sodium lauroylsarcosinate (NLS) and a non-ionic surfactant, sorbitan monolaurate (S20) in 1:1 phosphate...

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