4,5-dihydro-5-oxo-4-[[4-[[2-(sulphooxy)ethyl]sulphonyl]phenyl]azo]-1-(4-sulphophenyl)-1H-pyrazole-3-carboxylic acid

Genetic toxicity: in vitro

Administrative data

Endpoint:

in vitro gene mutation study in bacteria

Type of information:

experimental study

Adequacy of study:

weight of evidence

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 peer reviewed publication

Data source

Reference

Reference 1

Reference Type:

publication

Title:

Salmonella mutagenicity tests. IV. Results from the testing of 300 chemicals

Author:

Zeiger, E., Anderson, B., Haworth, S., Lawlor, T., and Mortelmans, K.

Year:

1998

Bibliographic source:

Environ. Molec. Mutagen. Vol. 11 (Suppl 12) (1988) 1-158

Reference 2

Reference Type:

other: Authoritative data base

Title:

NTP Study ID:528732

Author:

NTP

Year:

2012

Bibliographic source:

NTP (National Toxicological Program)by Agency for Toxic Substances and Disease Registry; Division of Toxicology/Toxicology Information Branch, 1600 Clifton Road NE, E-29, Atlanta, Georgia 30333

Reference 3

Reference Type:

other: Authoritative data base

Title:

GCID : 45725

Author:

ACToR Database

Year:

2011

Bibliographic source:

ACToR (Aggregated Computational Toxicology Resource):ZEIGER,E, ANDERSON,B, HAWORTH,S, LAWLOR,T AND MORTELMANS,K; SALMONELLA MUTAGENICITY TESTS: IV. RESULTS FROM THE TESTING OF 300 CHEMICALS; ENVIRON. MOL. MUTAGEN. 11(SUPPL.12):1-158, 1988

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

other: Refer below principle

Principles of method if other than guideline:

The test chemical Pigment yellow 100 (C.I. 19140) was studied for its ability to induce mutations in strains of Salmonella typhimurium.

GLP compliance:

not specified

Type of assay:

bacterial reverse mutation assay

Test material

Test material information

Constituent 1

Reference substance name:

Aluminium, 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-4-[(4-sulfophenyl)azo]-1H-pyrazole-3-carboxylic acid complex

EC Number:

235-428-9

EC Name:

Aluminium, 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-4-[(4-sulfophenyl)azo]-1H-pyrazole-3-carboxylic acid complex

Cas Number:

12225-21-7

Molecular formula:

C48H33AlN12O27S6

IUPAC Name:

aluminum tris(4-{[3-carboxy-5-oxo-1-(4-sulfophenyl)-4,5-dihydro-1H-pyrazol-4-yl]diazenyl}benzenesulfonate)

Details on test material:

- Name of the test material: Pigment yellow 100
- IUPAC name: aluminum tris(4-{[3-carboxy-5-oxo-1-(4-sulfophenyl)-4,5-dihydro-1H-pyrazol-4-yl]diazenyl}benzenesulfonate)
- Molecular formula: C48H33AlN12O27S6
- Molecular weight: 495.4038 g/mol
- Substance type: Organic
- Inchi: 1S/C16H12N4O9S2.Al/c21-15-13(18-17-9-1-5-11(6-2-9)30(24,25)26)14(16(22)23)19-20(15)10-3-7-12(8-4-10)31(27,28)29;/h1-8,13H,(H,22,23)(H,24,25,26)(H,27,28,29);/b18-17+;

Specific details on test material used for the study:

- Name of the test material: Pigment yellow 100
- IUPAC name: aluminum tris(4-{[3-carboxy-5-oxo-1-(4-sulfophenyl)-4,5-dihydro-1H-pyrazol-4-yl]diazenyl}benzenesulfonate)
- Molecular formula: C48H33AlN12O27S6
- Molecular weight: 495.4038 g/mol
- Substance type: Organic
- Purity: Labelled: 26%; Analyzed: 27%
- Inchi: 1S/C16H12N4O9S2.Al/c21-15-13(18-17-9-1-5-11(6-2-9)30(24,25)26)14(16(22)23)19-20(15)10-3-7-12(8-4-10)31(27,28)29;/h1-8,13H,(H,22,23)(H,24,25,26)(H,27,28,29);/b18-17+;

Method

Target gene:

Histidine

Species / strain

Species / strain / cell type:

S. typhimurium, other: TA100, TA1535, TA1537, TA97 and TA98

Details on mammalian cell type (if applicable):

Not applicable

Additional strain / cell type characteristics:

not specified

Cytokinesis block (if used):

No data

Metabolic activation:

with and without

Metabolic activation system:

10% and 30% HLI and RLI S-9 (9,000 g supernatant) fractions were prepared from Aroclor 1254-induced, male Sprague- Dawley rat and male Syrian hamster livers

Test concentrations with justification for top dose:

0, 100, 333, 1000, 3333, 6666 or 10000 µg/plate

Vehicle / solvent:

- Vehicle(s)/solvent(s) used: Dimethyl Sulfoxide (DMSO)
- Justification for choice of solvent/vehicle: The test chemical was soluble in DMSO

Controls

Controls 1

Untreated negative controls:

not specified

Negative solvent / vehicle controls:

yes

Remarks:

DMSO

True negative controls:

not specified

Positive controls:

yes

Positive control substance:

other: 2-aminoanthracene

Remarks:

For strains tested with S9

Controls 2

Untreated negative controls:

not specified

Negative solvent / vehicle controls:

yes

Remarks:

DMSO

True negative controls:

not specified

Positive control substance:

sodium azide

Remarks:

For strains TA100 and TA1535 tested in the absence of S9

Controls 3

Untreated negative controls:

not specified

Negative solvent / vehicle controls:

yes

Remarks:

DMSO

True negative controls:

not specified

Positive controls:

yes

Positive control substance:

9-aminoacridine

Remarks:

For strains TA97 and TA1537 tested in the absence of S9

Controls 4

Untreated negative controls:

not specified

Negative solvent / vehicle controls:

yes

Remarks:

DMSO

True negative controls:

not specified

Positive controls:

yes

Positive control substance:

other: 4-nitro-o-phenylenediamine

Remarks:

For strain TA98 tested in the absence of S9

Details on test system and experimental conditions:

METHOD OF APPLICATION: preincubation

DURATION
- Preincubation period: 20 mins
- Exposure duration: 48 hrs
- Expression time (cells in growth medium): 48 hrs
- Selection time (if incubation with a selection agent): No data available
- Fixation time (start of exposure up to fixation or harvest of cells): No data available

SELECTION AGENT (mutation assays): No data available
SPINDLE INHIBITOR (cytogenetic assays): No data available
STAIN (for cytogenetic assays): No data available

NUMBER OF REPLICATIONS: Triplicate

NUMBER OF CELLS EVALUATED: No data available

DETERMINATION OF CYTOTOXICITY
- Method: mitotic index; cloning efficiency; relative total growth; other: No data available

OTHER EXAMINATIONS:
- Determination of polyploidy: No data available
- Determination of endoreplication: No data available
- Other: No data available

OTHER: No data available

Rationale for test conditions:

No data

Evaluation criteria:

Evaluations were made at both the individual trial and overall chemical levels.

Individual trials were judged mutagenic (+), weakly mutagenic (+ W), questionable
(?), or nonmutagenic (-), depending on the magnitude of the increase of his+ revertants, and the shape of the dose-response. A trial was considered questionable (?) if the dose-response was judged insufficiently high to support a call of “ +W,” if only a single dose was elevated over the control, or if the increase seen was not dose related. The distinctions between a questionable mutagenic response and a nonmutagenic or weak mutagenic response, and between a weak mutagenic response and mutagenic response are highly subjective. It was not necessary for a response to reach two fold over background for a chemical to be judged mutagenic.

A chemical was judged mutagenic (+) or weakly mutagenic (+ W) if it produced a reproducible dose-related reponse over the solvent control in replicate trials. A chemical was judged questionable (?) if the results of individual trials were not reproducible, if increases in his+ revertants did not meet the criteria for a “+W” response, or if only single doses produced increases in his+ revertants in repeat trials.

Chemicals were judged nonmutagenic (-) if they did not meet the criteria for a mutagenic or questionable response. The chemicals were decoded by the chemical repository only after a determination had been made regarding their mutagenicity or nonmutagenicity.

Statistics:

Mean ± SD

Results and discussion

Test results

Species / strain:

S. typhimurium, other: TA100, TA1535, TA1537, TA97 and TA98

Metabolic activation:

with and without

Genotoxicity:

negative

Cytotoxicity / choice of top concentrations:

not specified

Vehicle controls validity:

valid

Untreated negative controls validity:

not specified

Positive controls validity:

valid

Additional information on results:

TEST-SPECIFIC CONFOUNDING FACTORS
- Effects of pH: No data available
- Effects of osmolality: No data available
- Evaporation from medium: No data available
- Water solubility: No data available
- Precipitation: No data available
- Other confounding effects: No data available

RANGE-FINDING/SCREENING STUDIES: All chemicals were tested initially in a toxicity assay to determine the appropriate dose range for the mutagenicity assay. The toxicity assay was performed using TA100. Toxic concentrations were those that produced a decrease in the number of his+ colonies, or a clearing in the density of the background lawn, or both.

COMPARISON WITH HISTORICAL CONTROL DATA: Yes

ADDITIONAL INFORMATION ON CYTOTOXICITY: No data available

Remarks on result:

other: No mutagenic potential

Any other information on results incl. tables

Strain: TA100

Dose	No Activation  (Negative)		No Activation  (Negative)		30% RLI  (Negative)		30% HLI  (Negative)		10% RLI  (Negative)		10% HLI  (Negative)
Protocol	Preincubation		Preincubation		Preincubation		Preincubation		Preincubation		Preincubation
ug/Plate	Mean	±SEM	Mean	±SEM	Mean	±SEM	Mean	±SEM	Mean	±SEM	Mean	±SEM
0	146	10	127	7.5	145	14.7	167	6.8	107	10.1	107	6.8
100	133	3.7	137	7.5	143	4.7	165	17.8	123	16.5	117	11.4
333	130	3.8	152	5	116	5	155	10.8	122	4.4	128	8.7
1000	146	6.1	136	6.7	127	.7	116	16.5	130	13.5	117	13.1
3333	109	4	65	7.9	130	15.3	118	5.9	106	5.8	85	8.7
6666			16	.7					75	11.4	53	8.9
10000	37	9			65	8.2	61	12.6
Positive Control	604	4	550	21.1	478	14.7	529	14.2	515	46	548	52.7

Strain: TA1535

Dose	No Activation  (Negative)		No Activation  (Negative)		30% RLI  (Negative)		30% HLI  (Negative)		10% RLI  (Negative)		10% HLI  (Negative)
Protocol	Preincubation		Preincubation		Preincubation		Preincubation		Preincubation		Preincubation
ug/Plate	Mean	±SEM	Mean	±SEM	Mean	±SEM	Mean	±SEM	Mean	±SEM	Mean	±SEM
0	31	1	20	.6	15	1.8	9	2	8	.6	10	1.5
100	26	1.5	20	1.5	14	1.9	10	1.8	11	1.2	12	2
333	30	5.2	16	.6	16	2.2	8	1.2	7	2.5	7	.9
1000	30	4	25	6.9	15	1.9	8	1.5	9	.9	8	.9
3333	24	3.7	15	2.5	11	1.2	8	3.1	9	2.7	6	1.5
6666			14	2.6					6	.9	6	.3
10000	21	1.9			13	1.9	7	.7
Positive Control	357	22.3	499	21.5	218	6.6	388	17.1	121	8.4	219	4.6

Strain: TA1537

Dose	No Activation  (Negative)		30% RLI  (Negative)		30% HLI  (Negative)
Protocol	Preincubation		Preincubation		Preincubation
ug/Plate	Mean	±SEM	Mean	±SEM	Mean	±SEM
0	8	.7	14	1.5	15	.6
100	6	1.5	11	1.7	12	3.5
333	10	1.9	15	1.8	12	1.9
1000	11	1.8	12	.6	10	.3
3333	6	.6	9	1.5	6	0
10000	5	1.2	8	1.9	4	0
Positive Control	309	5	41	2.3	46	3.3

Applicant's summary and conclusion

Conclusions:

Pigment yellow 100(12225-21-7) is not mutagenic to the Salmonella typhimurium TA100, TA1535, TA1537, TA97 and TA98 in the presence and absence of rat and hamster liver S9 metabolic activation system and hence it is not likely to classify as a gene mutant in vitro.

Executive summary:

Pigment yellow 100 was studied for its ability to induce mutations in strains of Salmonella typhimurium. The test compound was dissolved in DMSO and was tested at concentration of 0, 100, 333, 1000, 3333, 6666 or 10000 µg/plate using Salmonella typhimurium TA100, TA1535, TA1537, TA97 and TA98 in the presence and absence of 10 % and 30 % rat and hamster liver S9 metabolic activation system. Preincubation assay was performed with a preicubation for 20 mins. The plates were observed for histidine independence after 2 days incubation period. Concurrent solvent and positive controls were included in the study.Pigment yellow 100 is not mutagenic to the Salmonella typhimurium TA100, TA1535, TA1537, TA97 and TA98 in the presence and absence of rat and hamster liver S9 metabolic activation system  and hence it is not likely to classify as a gene mutant in vitro.