Hydrotropic surfactants

HYDROTROPIC SURFACTANTS

Product Information Guide Formulations

HYDROTROPIC SURFACTANTS
Hydrotropes are often used in alkaline cleaners where they have the following functions:

Increase cloud point of nonionic surfactants Clearing-up of cleaner formulations Stabilization of cleaners at higher temperatures

Traditional hydrotropes, such as sodium cumene sulphonate usually act only assolubilizers. Thanks to their chemical structure, HYDROTROPIC SURFACTANTS offer in addition to their excellent solubilizing properties the following benefits:

Decreasing of surface tension, especially in alkaline solutions, with good wetting of surfaces to be cleaned Ability to form micelles, improving both soil removal and soil dispersing capability in the cleaning liquid Lower amount neededfor clearing-up of cleaner formulations

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HYDROTROPIC SURFACTANTS of ZSCHIMMER & SCHWARZ:

SULFETAL 4105 Sodium-2-ethylhexylsulphate SULFETAL 4069 Sodium-alkyl (C8-10)-sulphate AMPHOTENSID EH Sodium-2-ethylhexyliminodipropionate AMPHOTENSID CCF Sodium-alkyl (C8-18)-iminodipropionate

Biodegradability: All above products are > 60 % biodegradable according to OECD 301 D / F and thus complywith the European Detergents Legislation EC 648/2004.

Classification/Labelling according to EC directives: SULFETAL 4105, SULFETAL 4069 and AMPHOTENSID CCF are classified as Xi – Irritant with R-phrases 38/41. AMPHOTENSID EH is not classified as hazardous.

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Hydrotropic Surfactants: Typical Data
Ionic character anionic Active matter (WaS) [ % ] 42

Product name SULFETAL 4105

Chem.Composition Sodium-2ethylhexylsulphate

Appearance clear, colourless to yellow liquid

Salt content 1 % Na2SO4

SULFETAL 4069

Sodium-alkyl(C810)sulphate

clear, colourless to yellow liquid

anionic

43

2 % Na2SO4

AMPHOTENSID EH

Sodium-2-ethylhexyliminodipropionate

clear, colourless to yellow liquid

amphoteric

40

salt free

AMPHOTENSID CCF

Sodium- alkyl(C8-18)iminodipropionate

clear, yellow liquid

amphoteric

40

salt free

Product name

Chem. Composition

Surface Tension
[ mN/m ]

1)

Foam volume beating method2)
[ mL ]

Foam volume air bubble method 3)
[ mL ]

H2O

1% NaOH

5% NaOH

H2O

H2O ) 17 ° 4 dH --

H2O

H2O ) 17 ° 4 dH --

blank without surfactant

73

74

77

--

--

SULFETAL 4105Sodium-2-ethylhexylsulphate

32

29

28

40

0

200

70

SULFETAL 4069

Sodium-alkyl(C8-10)sulphate

31

31

29

280

290

570

500

AMPHOTENSID EH

Sodium-2-ethylhexyliminodipropionate

34

32

28

20

0

60

20

AMPHOTENSID CCF

Sodium- alkyl (C8-18)iminodipropionate

37

41

39

890

770

5)

690

670

5)

1) Wilhelmymethod (plate), 2 % WaS, 25 ° C; 2) DIN 53902, after 60 s, 1 g/L WaS, 25 ° C; 3) Air bubble method, Z&S-method: foam generation by air flow through solution, 1 g/L WaS, 25 ° ; 4) hard water with hardness 17 ° = equal to 303 ppm CaCO3 ; C dH 5) 0.1 % NTA added

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1.

SULFETAL 4105: Sodium-2-ethylhexylsulfate

Properties and Benefits:
42 % anionic active matter low foaming stable to alkalistable to acids (see point 1.1.) compatible with hydrogen peroxide (see point 1.2) compatible with hypochlorite (after 6 months still 80 % of free chlorine present, see point 1.2.) decrease of surface tension in alkaline solutions hydrotropic performance in weak to medium alkaline cleaner systems (see point 1.5.) no attack on polycarbonate free of chloride

Values and graphics:

1.1. SULFETAL4105 : Compatibility with various acids
Acid 1 month 3 months 6 months 12 months

Acetic acid c(CH3COOH) = 3,0 mol/L; w(CH3COOH = 180 g/L; pH = 1.0 Citric acid c(C6H8O7) = 3,0 mol/L; w(C6H8O7) = 576 g/L; pH = 0.5 Phosphoric acid c(H3PO4) = 3,0 mol/L ; w(H3PO4) = 294 g/L; pH = 0 Sulphuric acid c(H2SO4) = 0,5 mol/L ; w(H2SO4) = 49 g/L; pH = 0.3 Sulphuric acid c(H2SO4) = 1,5 mol/L ; w(H2SO4) = 157...