SAAPedia Home

Polysorbate 61

Time: 2019-12-22 22:57:54; Count: 1

Polysorbate 61


Tween 61;

Polyethylene glycol (4) sorbitan monostearate;

PEG-4 sorbitan stearate;

Polyoxyethylene (4) sorbitan monostearate;


Non-ionic surfactant

> Polyether

>> Ester Polyether

>>> Ester Polyoxyethylene Ether

>>>> Polyoxyethylene Sugar Alcohol and Dehydrated Sugar Alcohol Esters

Chemical Numbering System

CASRN: 9005-67-8

EINECS: 500-020-4

Molecular Formula & Molecular Weight

Molecular Formula: N/A

Molecular Weight: N/A


Schematic formula:


Appearance    (1), milky-white to yellow-brown liquid; or paste.

Solubility    soluble in water (dispersible in water).

Stability    stable. Under strong acid or strong alkali condition, easily hydrolyzed.

Risk    Liquid form: 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.10) label:  

Animal Toxicity

Table 1 Animal toxicity values

mouse intravenous LDLo


rat intraperitoneal LDLo

> 4000mg/kg[1]

rat intravenous LD50


rat oral LD50

> 60mL/kg[1]

Ecology    may be hazardous to environment. Water body should be given special attention.

Biodegradability    biodegradable.

Characteristics    excellent emulsifying, dispersing, solubilizing, lubricating abilities.

Note    (1), The by-product 1,4-dioxane is a possible carcinogen. Generally, can be acceptable when concentration of 1,4-dioxane is less than 30ppm or less.

(2), Be careful with using in children's products.



Quality Standards & Test Methods

1, Physical and chemical indexes


Physical and chemical indexes


Actives, %, ≥


Test Methods

(1), Actives

GB/T 13173 Surface active agents -- Detergents -- Testing methods

2, Hazardous substances indexes


Hazardous substances indexes


Heavy metals (as Pb), mg/Kg, ≤


As, mg/Kg, ≤


Test Methods

(1), Heavy metals (as Pb)

Safety and Technical Standards for Cosmetics (2015 Edition)

GB/T 30799 The test method of food detergents -- Determination of heavy metals

(2), As

Safety and Technical Standards for Cosmetics (2015 Edition)

GB/T 30797 The test method of food detergents -- Determination of total arsenic

3, Further explanation

(a), On physical and chemical indexes: firstly, shall be indicated carbon atom distribution; secondly, shall be indicated average molecular weight.

(b), Used in cosmetics, should be test for harmful substances or furtherly test for microorganisms, according to local regulations and standards.

Major Uses

1, Typical applications

Use as emulsifying agent, dispersing agent.

Use as solubilizing agent.

Use as lubricant.

Use as plasticizer.

2, Personal care products

Emulsifying agent in personal care products.

3, Textile

Antistatic agent, emulsifying agent in fiber, textile, leather.

4, Polymer

Lubricant in plastics.

5, Machinery

Lubricant in metal processing.




[1]: ChemIDplus. 9005-67-8, Polyoxyethylene sorbitan monostearate


[Terminology] Dispersion system

[Terminology] Vesicle

Pandect of Ester surfactants (1): Definition

[Terminology] Van Der Waals force

[Terminology] Micellar aggregation number


Test methods of surfactants, catalog, Chinese national standards

Surfactants, catalog, Chinese national standards