Calcium 3-hydroxy-4-[(4-methyl-2-sulphonatophenyl)azo]-2-naphthoate

Hydrolysis

Link to relevant study record(s)

Reference

Endpoint:

hydrolysis

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

Justification for type of information:

Data is from authoritative database and secondary source

Qualifier:

according to guideline

Guideline:

OECD Guideline 111 (Hydrolysis as a Function of pH)

Principles of method if other than guideline:

Determination of hydrolysis of test chemical calcium 3-hydroxy-4-[(4-methyl-2-sulfonatophenyl)diazenyl]-2-naphthoate at different pH range. The study was performed according to OECD Guideline 111 (Hydrolysis as a Function of pH).

GLP compliance:

not specified

Specific details on test material used for the study:

- Name of test material (IUPAC name): calcium 3-hydroxy-4-[(4-methyl-2-sulfonatophenyl)diazenyl]-2-naphthoate- Common name: C. I. Pigment 57:1- Molecular formula: C18H12CaN2O6S- Molecular weight: 424.445 g/mol- Smiles notation: c12c(c(c(C(=O)[O-])cc1cccc2)O)\N=N\c1c(cc(C)cc1)S(=O)(=O)[O-].[Ca+2]- InChI: 1S/C18H14N2O6S.Ca/c1-10-6-7-14(15(8-10)27(24,25)26)19-20-16-12-5-3-2-4-11(12)9-13(17(16)21)18(22)23;/h2-9,21H,1H3,(H,22,23)(H,24,25,26);/q;+2/p-2/b20-19+;- Substance type: Organic - Physical state: Solid- Purity: 95-97%

Radiolabelling:

not specified

Analytical monitoring:

not specified

Temp.:

50 °C

Remarks:

Study was performed at different pH range, i.e, at pH 4, 7 and 9.

Positive controls:

not specified

Negative controls:

not specified

Transformation products:

not specified

pH:

4

Temp.:

50 °C

Remarks on result:

other: at pH range 4, 5 and 7, respectively. Half-life value of test chemical is not known, but chemical is stable i.e not hydrolysed at pH 4, 7 and 9, respectively.

Details on results:

Test chemical calcium 3-hydroxy-4-[(4-methyl-2-sulfonatophenyl)diazenyl]-2-naphthoate was reported to be hydrolytically stable at pH 4, 7 and 9, respectively and at a temperature of 50⁰C.

Validity criteria fulfilled:

not specified

Conclusions:

Test chemical calcium 3-hydroxy-4-[(4-methyl-2-sulfonatophenyl)diazenyl]-2-naphthoate was reported to be hydrolytically stable at pH 4, 7 and 9, respectively and at a temperature of 50⁰C.

Executive summary:

The half-life of the test chemical calcium 3-hydroxy-4-[(4-methyl-2-sulfonatophenyl)diazenyl]-2-naphthoate (CAS no. 5281-04-9) was determined at different pH range. The study was performed according to OECD Guideline 111 (Hydrolysis as a Function of pH) at a temperature of 50°C. Although, half-life value of test chemical is not known, but chemical calcium 3-hydroxy-4-[(4-methyl-2-sulfonatophenyl)diazenyl]-2-naphthoatewas reported to be hydrolytically stable at pH 4, 7 and 9, respectively and at a temperature of50⁰C. Based on this, it is concluded that the chemical calcium 3-hydroxy-4-[(4-methyl-2-sulfonatophenyl)diazenyl]-2-naphthoateisnot hydrolysable.

Description of key information

The half-life of the test chemical calcium 3-hydroxy-4-[(4-methyl-2-sulfonatophenyl)diazenyl]-2-naphthoate (CAS no. 5281-04-9) was determined at different pH range. The study was performed according to OECD Guideline 111 (Hydrolysis as a Function of pH) at a temperature of 50°C. Although, half-life value of test chemical is not known, but chemical calcium 3-hydroxy-4-[(4-methyl-2-sulfonatophenyl)diazenyl]-2-naphthoatewas reported to be hydrolytically stable at pH 4, 7 and 9, respectively and at a temperature of50⁰C. Based on this, it is concluded that the chemical calcium 3-hydroxy-4-[(4-methyl-2-sulfonatophenyl)diazenyl]-2-naphthoateisnot hydrolysable.

Additional information

The half-life of the test chemical calcium 3-hydroxy-4-[(4-methyl-2-sulfonatophenyl)diazenyl]-2-naphthoate (CAS no. 5281-04-9) was determined at different pH range. The study was performed according to OECD Guideline 111 (Hydrolysis as a Function of pH) at a temperature of 50°C. Although, half-life value of test chemical is not known, but chemical calcium 3-hydroxy-4-[(4-methyl-2-sulfonatophenyl)diazenyl]-2-naphthoatewas reported to be hydrolytically stable at pH 4, 7 and 9, respectively and at a temperature of50⁰C. Based on this, it is concluded that the chemical calcium 3-hydroxy-4-[(4-methyl-2-sulfonatophenyl)diazenyl]-2-naphthoateisnot hydrolysable.