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Physical & Chemical properties

Boiling point

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Administrative data

Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
other information
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
other: Documentation insufficient for assessment. No guideline followed, no data on test method nor GLP only the apparatus used was cited.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1998
Report Date:
1998

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
capillary and accredited thermometer were used
no more data
GLP compliance:
not specified

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
- Name of test material: liquid sample, hypophosphite de sodium 810 g/L
- Lot/batch No.: 7 samples from different batches have been used
for details see table 1 in the Results freetext
- Sample concentrations : 810 g/L (commercial concentration)

Results and discussion

Boiling pointopen allclose all
Boiling pt.:
> 113 - < 114 °C
Remarks on result:
other: solutions at 810 g/L (6 replicates: average at 113.5 °C)
Boiling pt.:
106
Remarks on result:
other: solution at 50%

Any other information on results incl. tables

Table 1: details of the measured boiling points

Name

Sample designation

Number of lot

Boiling point

+/- 1 (°C)

Sodium hypophosphite 810 g/L

L1

97-51

114

L2

97-53

114

L3

98-2

113

L4

98-17

114

L5

98-18

113

L6

98-19

113

H3PO2, 50%

L11

nd

106

nd : no data

Applicant's summary and conclusion

Conclusions:
In the test conditions, the boiling point of solution of sodium hypophosphite is between 113°C and 114°C (average 113.5 °C)
Executive summary:

Boiling point of solution of sodium hypophosphite (i.e. hypophosphorous acid solutions) was measured with an accredited thermometer and a capillary. 6 lots at commercial concentration of 810 g/L have been tested plus an additional sample at a concentration of 50%.

No more data are given in the study report.

Boiling point was measured between 113 and 114 °C (average at 113.5) at 810 g/L and at 106 °C at 50% concentration.

As documentation is insufficient for assessment this study is considered as not assignable.