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Physical & Chemical properties

Water solubility

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Reference
Endpoint:
water solubility
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Remarks:
Information contained in an authoritative, standard reference work in industrial chemistry. The authors were employed at the Amoco Chemical Company, with direct access to company data/information relevant to the commercial production of terephthalic acid.
Reason / purpose for cross-reference:
reference to same study
Qualifier:
no guideline followed
Principles of method if other than guideline:
Procedure not stated
GLP compliance:
not specified
Type of method:
other: Procedure not stated
Key result
Water solubility:
0.002 other: % (w/w)
Temp.:
25 °C
pH:
3.88
Remarks on result:
other: Solubility assumed to have been determined without pH adjustment, pH of saturated aqueous solution therefore expected to correspond to 25 degrees C value given at Point 4.20
Water solubility:
0.033 other: % (w/w)
Temp.:
100 °C
pH:
3.3
Remarks on result:
other: Solubility assumed to have been determined without pH adjustment, pH of saturated aqueous solution therefore expected to correspond to 100 degrees C value given at Point 4.20
Water solubility:
0.07 other: % (w/w)
Temp.:
120 °C
pH:
ca. 3
Remarks on result:
other: Solubility assumed to have been determined without pH adjustment, pH of saturated aqueous solution therefore expected to lie between the 100 and 150 degrees C values given at Point 4.20
Water solubility:
0.37 other: % (w/w)
Temp.:
160 °C
pH:
ca. 2.9
Remarks on result:
other: Solubility assumed to have been determined without pH adjustment, pH of saturated aqueous solution therefore expected to approximate to 150 degrees C value given at Point 4.20
Water solubility:
1.8 other: % (w/w)
Temp.:
200 °C
pH:
2.5
Remarks on result:
other: Solubility assumed to have been determined without pH adjustment, pH of saturated aqueous solution therefore expected to correspond to 200 degrees C value given at Point 4.20
Water solubility:
8.5 other: % (w/w)
Temp.:
240 °C
pH:
2.1
Remarks on result:
other: Solubility assumed to have been determined without pH adjustment, pH of saturated aqueous solution therefore expected to approximate to 250 degrees C value given at Point 4.20
Conclusions:
Interpretation of results: slightly soluble (0.1-100 mg/L)The limit of solubility of terephthalic acid (TPA) in water at 25 degrees C is ca. 17 mg/L. TPA is therefore considered to be slightly soluble in water.

Description of key information

The limit of solubility of terephthalic acid (TPA) in water at 25 degrees C is ca. 17 to 19 mg/L.  TPA is therefore considered to be slightly soluble in water.  

Key value for chemical safety assessment

Water solubility:
17 mg/L
at the temperature of:
25 °C

Additional information