The Span 20 is an organic compound with the formula C₁₈H₃₄O₆. The IUPAC name of this chemical is [(2R)-2-[(3R,4S)-3,4-dihydroxyoxolan-2-yl]-2-hydroxyethyl] dodecanoate. With the CAS registry number 1338-39-2, it is also named as 1,4-Anhydro-6-O-dodecanoyl-D-glucitol. The product's categories are Ester Type (Surfactants); Functional Materials; Nonionic Surfactants; Surfactants; Cosmetic Ingredients & Chemicals. Besides, it should be stored in a closed cool and dry place. It is mainly used in cosmetics, pharmaceutical, textile industry, for water in oil emulsifier, wetting agents and lubricants for machinery.Span type materials are artificial esters of the common fatty acids & hexitol anhydrides derived from sorbitol.

Physical properties about Span 20 are:
 (1)ACD/LogP: 4.47; (2)ACD/LogD (pH 5.5): 4.47; (3)ACD/LogD (pH 7.4): 4.47; (4)ACD/BCF (pH 5.5): 1467.25; (5)ACD/BCF (pH 7.4): 1467.25; (6)ACD/KOC (pH 5.5): 6429.57; (7)ACD/KOC (pH 7.4): 6429.55; (8)#H bond acceptors: 6; (9)#H bond donors: 3; (10)#Freely Rotating Bonds: 17; (11)Polar Surface Area: 96.22 Å²; (12)Index of Refraction: 1.504; (13)Molar Refractivity: 91.36 cm³; (14)Molar Volume: 308.4 cm³; (15)Polarizability: 36.22×10^-24cm³; (16)Surface Tension: 47.6 dyne/cm; (17)Density: 1.123 g/cm³; (18)Flash Point: 176.9 °C; (19)Enthalpy of Vaporization: 90.71 kJ/mol; (20)Boiling Point: 516.1 °C at 760 mmHg; (21)Vapour Pressure: 8.23E-13 mmHg at 25°C.

Preparation of Span 20:
this chemical can be prepared by sorbitol.


You can still convert the following datas into molecular structure:
(1)SMILES: O[C@H](COC(=O)CCCCCCCCCCC)C1OC[C@H](O)[C@H]1O
(2)InChI: InChI=1/C18H34O6/c1-2-3-4-5-6-7-8-9-10-11-16(21)23-13-15(20)18-17(22)14(19)12-24-18/h14-15,17-20,22H,2-13H2,1H3/t14-,15+,17+,18?/m0/s1
(3)InChIKey: LWZFANDGMFTDAV-URHIDPGUBX
(4)Std. InChI: InChI=1S/C18H34O6/c1-2-3-4-5-6-7-8-9-10-11-16(21)23-13-15(20)18-17(22)14(19)12-24-18/h14-15,17-20,22H,2-13H2,1H3/t14-,15+,17+,18?/m0/s1
(5)Std. InChIKey: LWZFANDGMFTDAV-URHIDPGUSA-N.

The toxicity data of Span 20 is as follows: