Manganese, 4-[(4-chloro-5-methyl-2-sulfophenyl)azo]-3-hydroxy-2-naphthalenecarboxylic acid complex

Repeated dose toxicity: dermal

Administrative data

Endpoint:

short-term repeated dose toxicity: dermal

Type of information:

read-across based on grouping of substances (category approach)

Adequacy of study:

key study

Justification for type of information:

Please see the category read-across justification in the category object.

Cross-reference

Reason / purpose for cross-reference:

read-across source

Reference

Endpoint:

chronic toxicity: dermal

Type of information:

experimental study

Adequacy of study:

supporting study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Performed prior to introduction of GLP. Limited details reported. Designed mainly to detect skin cancer. Full histopathology only performed for 5 of 50 animals per dose group.

Reason / purpose for cross-reference:

reference to same study

Qualifier:

no guideline followed

Principles of method if other than guideline:

18 months application twice weekly of 50 mg/kg bw onto shaved skin of mice with histopathology of skin and major organs

GLP compliance:

no

Limit test:

yes

Specific details on test material used for the study:

- Name of test material (as cited in study report): D&C Red 7
- Substance type: pigment
- Physical state: solid
- Analytical purity: 98%
- Impurities (identity and concentrations): no data
- Purity test date: no data
- Lot/batch No.: W4602
- Expiration date of the lot/batch: no data

Species:

mouse

Strain:

ICR

Sex:

male/female

Details on test animals or test system and environmental conditions:

TEST ANIMALS
- Source: no data
- Age at study initiation: no data
- Weight at study initiation: no data
- Fasting period before study: not applicable
- Housing: single
- Diet (e.g. ad libitum): ad libitum
- Water (e.g. ad libitum):ad libitum
- Acclimation period: no data


ENVIRONMENTAL CONDITIONS
no data

Type of coverage:

not specified

Vehicle:

water

Details on exposure:

Application of 0.1 ml of a 1% suspension in water
application site: 6 cm2

Initially. the hair on the dorsal area of each animal was clipped with an animal clipper free of lubricatirig oil. Subsequent periodic clipping was performed according to the rate of hair growth.

The test item suspension was prepared fresh weekly

Analytical verification of doses or concentrations:

not specified

Duration of treatment / exposure:

471 days (ca 18 months)

Frequency of treatment:

twice per week

Dose / conc.:

0.166 mg/cm² per day (nominal)

No. of animals per sex per dose:

50 for test item
150 for control
50 for positive control

Control animals:

yes, concurrent vehicle

Details on study design:

- Dose selection rationale: Based on human exposure from use in lipstick

Positive control:

3,4-benzpyrene, dissolved in acetone

Observations and examinations performed and frequency:

CAGE SIDE OBSERVATIONS: Yes
- Time schedule: daily
- Cage side observations not included

DETAILED CLINICAL OBSERVATIONS: Yes
- Time schedule: twice daily
DERMAL IRRITATION (if dermal study): No data
BODY WEIGHT: No data
OPHTHALMOSCOPIC EXAMINATION: No data
HAEMATOLOGY: No data
CLINICAL CHEMISTRY: No data
URINALYSIS: No data
NEUROBEHAVIOURAL EXAMINATION: No

Sacrifice and pathology:

GROSS PATHOLOGY: Yes
HISTOPATHOLOGY: Yes (preparation of: brain, pituitary, thyroid, thymus, liver, spleen, kidney, adrenal, stomach, small and large intestines, urinary bladder, axillary lymph nodes, testes, ovary, skin from area of treatment, any tissue massess, grossly abnormal organs; complete pathology only for each five males and females; skin and grossly abnormal organs for all animals)

Statistics:

no data

Details on results:

No test-item related effects were observed.

Dose descriptor:

NOEL

Effect level:

>= 50 other: mg/kg bw twice weekly

Based on:

test mat.

Sex:

male/female

Critical effects observed:

not specified

Materials and methods

Test material

Test material information

Constituent 1

Reference substance name:

Manganese, 4-[(4-chloro-5-methyl-2-sulfophenyl)azo]-3-hydroxy-2-naphthalenecarboxylic acid complex

EC Number:

235-471-3

EC Name:

Manganese, 4-[(4-chloro-5-methyl-2-sulfophenyl)azo]-3-hydroxy-2-naphthalenecarboxylic acid complex

Cas Number:

12238-31-2

Molecular formula:

C18H11N2O6SClMn

IUPAC Name:

10-carboxy-18-chloro-19-methyl-15,15-dioxo-12λ³,14λ³-dioxa-15λ⁶-thia-1λ⁴,22-diaza-13-manganapentacyclo[11.9.0.0²,¹¹.0³,⁸.0¹⁶,²¹]docosa-1(22),2(11),3,5,7,9,16,18,20-nonaene-13,13-bis(ylium)-12,14-diide

Test material form:

solid: nanoform

Details on test material:

Test materials used in this dossier are all considered to fall under the definition of nano-materials according to the European Commission Recommendation 2011/696/EU as the synthesis and manufacturing of this pigment always yields particulate material with a fine particle size distribution.

Results and discussion

Effect levels

Dose descriptor:

NOEL

Effect level:

> 50 other: mg/kg bw twice weekly

Based on:

other: read-across

Sex:

male/female

Basis for effect level:

other: no adverse effects expected

Target system / organ toxicity

Critical effects observed:

no