Sodium lactate

Viscosity

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

viscosity

Data waiving:

study technically not feasible

Justification for data waiving:

the study does not need to be conducted because the substance is a solid

Reference 2

Endpoint:

viscosity

Type of information:

experimental study

Adequacy of study:

key study

Study period:

November 1941

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

comparable to guideline study with acceptable restrictions

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Test Guideline 114 (Viscosity of Liquids)

Deviations:

not specified

GLP compliance:

no

Type of method:

capillary viscometer (static)

Specific details on test material used for the study:

In this experimental study only the dynamic viscosities of aqueous solutions of Sodium lactate with different concentrations been determined. Crystalline Sodium lactate is hygroscopic and extremely difficult to isolate, thus only manufactured and marketed as a concentrated aqueous solution.
The concentrations (w/w) of the Sodium lactate solutions are 1 %, 2 %, 5 %, 10 %, 20 %, 30 %, 40 %, 50 %, 60 % and 70 %.

Key result

Temp.:

other: 25 °C

Parameter:

dynamic viscosity (in mPa s)

Value:

379.9

Remarks on result:

other: Dynamic viscosity for 70 % (w/w) aqueous solution.

The following aqueous solutions of sodium lactate were investigated:

[C] % (w/w) Na - lactate	dynamic viscosity [mPa*s]
1%	0.93
2%	0.96
5%	1.06
10%	1.24
20%	2.04
30%	3.64
40%	7.29
50%	17.98
60%	55.06
70%	379.9

Conclusions:

The dynamic viscosities of different concentrated aqueous solutions of Sodium lactate were determined by the capillary method. The highest tested concentration of 70% w/w Sodium lactate in water showed a dynamic viscosity of η = 379.9 mPa × s.

Executive summary:

In an experimental study conducted comparable to OECD 114, the dynamic viscosities of different aqueous solutions of Sodium lactate were determined using the capillary method. Crystalline Sodium lactate is hygroscopic and extremely difficult to isolate, thus it only manufactured and marketed as a concentrated aqueous solution.

The dynamic viscosities for the different Sodium lactate concentrations in water were determined at 25 °C. The highest tested concentration of 70% w/w Sodium lactate in water showed a dynamic viscosity of η = 379.9 mPa × s. 

 

Description of key information

In an experimental study conducted comparable to an OECD 114, the dynamic viscosities of different aqueous solutions of Sodium lactate were determined using the capillary method. Crystalline Sodium lactate is hygroscopic and extremely difficult to isolate, thus it is only manufactured and marketed as a concentrated aqueous solution.

The dynamic viscosities for the different Sodium lactate concentrations in water were determined at 25 °C. The highest tested concentration of 70% w/w Sodium lactate in water showed a dynamic viscosity of η = 379.9 mPa × s. 

Sodium lactate is marketed as concentrated aqueous solution. Based on the test item's solubility in water (see IUCLID section 4.8) the results of aqueous Sodium lactate solutions (70 % (w/w)) can be considered representative. By extrapolating the existing data, it can be assumed that higher concentrations lead to higher dynamic viscosities.

Key value for chemical safety assessment

Viscosity:

379.9 mPa · s (dynamic)

at the temperature of:

25 °C