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Diss Factsheets

Physical & Chemical properties

Water solubility

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Endpoint:
water solubility
Type of information:
other: Handbook data
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Remarks:
From a trusted source acc. to "ECHA, Guidance on information requirements and chemical safety assessment – Chapter R.7a: Endpoint specific guidance".
Qualifier:
no guideline followed
Principles of method if other than guideline:
Not applicable - Handbook data
GLP compliance:
not specified
Type of method:
other: no data
Key result
Water solubility:
307 000 mg/L
Temp.:
25 °C
Remarks on result:
other: no pH was stated
Details on results:
Handbook data considered to be from a trusted source acc. to "ECHA, Guidance on information requirements and chemical safety assessment – Chapter R.7a: Endpoint specific guidance". However, no pH value was given in the CRC handbook for the water solubility of sodium sulphite.

No pH value was given but data could be regarded as valid according to "ECHA, Guidance on information requirements and chemical safety assessment – Chapter R.7a: Endpoint specific guidance".

Conclusions:
Interpretation of results: very soluble (> 10000 mg/L)
According to the reference, the water solublity of sodium sulphite is 307000 mg/L. In conclusion the test substance is very soluble. No pH was given.
Endpoint:
water solubility
Type of information:
other: Peer reviewed data
Adequacy of study:
supporting study
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
secondary literature
Qualifier:
no guideline followed
Principles of method if other than guideline:
Not applicable - Peer reviewed data
GLP compliance:
not specified
Type of method:
other: no data
Water solubility:
125.4 g/L
Temp.:
0 °C
Water solubility:
283 g/L
Temp.:
80 °C

Value from general accepted authoritative secondary source. No data available for pH value.

Conclusions:
Interpretation of results (migrated information): very soluble (> 10000 mg/L)
Sodium sulfite has a water solubility of 125.4 g/L at 0°C and of 283 g/L at 80°C.
Endpoint:
water solubility
Type of information:
other: authoritative secondary source
Adequacy of study:
supporting study
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
secondary literature
Qualifier:
no guideline followed
Principles of method if other than guideline:
Not applicable - authoritative secondary source
GLP compliance:
not specified
Type of method:
other: no data
Water solubility:
280 g/L
Temp.:
33.4 °C
pH:
ca. 9.8
Remarks on result:
other: 28 g/100 g solvent

pH Concentration: 1 wt %

Conclusions:
Interpretation of results: very soluble (> 10000 mg/L)
Approximately 280 g sodium sulfite are soluble in one litre solvent. The substance has its maximum solubility at 33.4 °C; at higher temperatures it is less soluble in water. The pH was determined to be 9.8.
Endpoint:
water solubility
Type of information:
other: Handbook data
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Remarks:
From a trusted source acc. to "ECHA, Guidance on information requirements and chemical safety assessment – Chapter R.7a: Endpoint specific guidance".
Qualifier:
no guideline followed
Principles of method if other than guideline:
Not applicable - Handbook data
GLP compliance:
not specified
Type of method:
other: no data
Water solubility:
other:
Temp.:
25 °C
Remarks on result:
other: soluble in 3.2 parts water at approx. 25 °C
Details on results:
Handbook data considered to be from a trusted source acc. to "ECHA, Guidance on information requirements and chemical safety assessment – Chapter R.7a: Endpoint specific guidance". However, no pH value was given in the Merck Index for the water solubility of disodium sufite.

No pH value was given but data could be regarded as valid according to "ECHA, Guidance on information requirements and chemical safety assessment – Chapter R.7a: Endpoint specific guidance".

Conclusions:
According to the reference, disodium sulfite is soluble in 3.2 parts of water.

Description of key information

Sodium sulfite is highly soluble in water. 

Key value for chemical safety assessment

Water solubility:
307 g/L
at the temperature of:
25 °C

Additional information

For the evaluation of this endpoint data from the CRC handbook were used as key information, supported by some other handbook data. According to "ECHA, Guidance on information requirements and chemical safety assessment – Chapter R.7a: Endpoint specific guidance", handbook data are considered to be from a trusted source. These handbooks including the CRC handbook.

According to the key information, sodium sulfite is highly soluble in water (determined at 25 °C; no pH was given). This information is supported by various other references:

Merck Index: Sodium sulfite is soluble in 3.2 parts water at 25 °C.

Kirk Othmer: Approximately 280 g sodium sulfite are soluble in one litre of water. The substance has its maximum solubility at 33.4 °C; at higher temperatures it is less soluble in water. The pH was determined to be 9.8.

IARC: Sodium sulfite has a water solubility of 125.4 g/L or 283 g/L at 0°C or 80 °C, respectively.

All these data confirm that sodium sulfite is highly soluble in water.