5-((4-chloro-6-((8-hydroxy-3,6-disulfo-7-((2-sulfo-4-((2(sulfooxy)ethyl)sulfonyl)phenyl)diazenyl)naphthalen-1-yl)amino)-1,3,5-triazin-2-yl)amino)-4-hydroxy-3-((Z)-(3-sulfophenyl)diazenyl)naphthalene-2,7-disulfonic acid

pH

Administrative data

Endpoint:

pH

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Justification for type of information:

Experimental test result performed using standard test guidelines

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2021

Report date:

2021

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 122 (Determination of pH, Acidity and Alkalinity)

GLP compliance:

no

Test material

Test material information

Constituent 1

Reference substance name:

5-{[4-chloro-6-({8-hydroxy-3,6-disulfo-7-[(3- sulfophenyl)diazenyl]-1-naphthyl}amino)-1,3,5- triazin-2-yl]amino}-4-hydroxy-3-[(2-sulfo-4-{[2- (sulfooxy)ethyl]sulfonyl}phenyl)diazenyl]naphthalene- 2,7-disulfonic acid

Cas Number:

947-603-3

Molecular formula:

C37H28ClN9O26S8

IUPAC Name:

5-{[4-chloro-6-({8-hydroxy-3,6-disulfo-7-[(3- sulfophenyl)diazenyl]-1-naphthyl}amino)-1,3,5- triazin-2-yl]amino}-4-hydroxy-3-[(2-sulfo-4-{[2- (sulfooxy)ethyl]sulfonyl}phenyl)diazenyl]naphthalene- 2,7-disulfonic acid

Details on test material:

- Name of the test material: 5-{[4-chloro-6-({8-hydroxy-3,6-disulfo-7-[(3- sulfophenyl)diazenyl]-1-naphthyl}amino)-1,3,5-
triazin-2-yl]amino}-4-hydroxy-3-[(2-sulfo-4-{[2- (sulfooxy)ethyl]sulfonyl}phenyl)diazenyl]naphthalene-
2,7-disulfonic acid
- Common name: Reactive Red 49k
- Molecular formula: C37H28ClN9O26S8

- Moleculr weight: 1306.63 g/mol
- SMILES: [H]OS(=O)(=O)C1=CC(=CC=C1)\N=N/C1=C(C=C2C=C(C=C(NC3=NC(NC4=CC(=CC5=CC(=C(N=NC6=C(C=C(C=C6)S(=O)(=O)
CCOS(O)(=O)=O)S(O)(=O)=O)C(O)=C45)S(O)(=O)=O)S(O)(=O)=O)=NC(Cl)=N3)C2=C1O)S(O)(=O)=O)S(O)(=O)=O
- InChI: 1S/C37H28ClN9O26S8/c38-35-41-36(39-24-13-21(76(55,56)57)8-16-10-27(79(64,65)66)31(33(48)29(16)24)46-
44-18-2-1-3-20(12-18)75(52,53)54)43-37(42-35)40-25-14-22(77(58,59)60)9-17-11-28(80(67,68)69)32(34(49)30(17)25)
47-45-23-5-4-19(15-26(23)78(61,62)63)74(50,51)7-6-73-81(70,71)72/h1-5,8-15,48-49H,6-7H2,(H,52,53,54)(H,55,56,57)
(H,58,59,60)(H,61,62,63)(H,64,65,66)(H,67,68,69)(H,70,71,72)(H2,39,40,41,42,43)/b46-44-,47-45?
- Substance type: Organic
- Physical state: Solid

Results and discussion

pH value

Key result

pH value:

5.44

Temp.:

24.8 °C

Concentration:

1 vol%

Any other information on results incl. tables

TEST RESULTS

Method Details		Observations	Remarks if, any
Guideline	OECD 122
Method	Digital pH meter
Principle of method	The pH of an aqueous solution or dispersion in water is determined with a pH measurement interface equipped with an appropriate electrode system.
Temperature of 1% w/v test solution	-	24.8°C
pH (RESULT)	-	5.44
Inference	1.   Acidic 2.   Basic 3.   Neutral	Acidic

Applicant's summary and conclusion

Conclusions:

The pH determination of test chemical was done as per the test guideline OECD 122. The mean pH of the 1% w/v test dispersion was determined with the help of digital pH meter. The mean pH was determined to be 5.44 at 24.8°C.

Executive summary:

The pH of test chemical was determined. The study was performed in accordance with OECD Guideline 122 (Determination of pH, Acidity and Alkalinity). The mean pH of the 1% w/v test dispersion was determined with the help of digital pH meter. The mean pH was determined to be 5.44 at 24.8°C. Thus, test chemical was considered to be acidic in nature.