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Toxicological information

Skin irritation / corrosion

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Administrative data

Endpoint:
skin irritation: in vivo
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 databases and NTRL reports

Data source

Referenceopen allclose all

Reference Type:
other: Authoritative database
Title:
HSDB for the CAS: 28407-37-6
Author:
U.S National Library of Medicine
Year:
2003
Bibliographic source:
Hazardous Substances Databank [HSDB], U.S National Library of Medicine, last updated 2003
Reference Type:
secondary source
Title:
Acute Dermal Irritation in Rabbits for CAS- 28407-37-6
Author:
NTRL
Year:
1982
Bibliographic source:
OTS0206237, NTRL report, last updated 1982

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
other: 16 CFR 1500.41 &16 CFR 1500.3 Guidelines
Principles of method if other than guideline:
To determine the primary irritation index of C.I. Direct Blue 218 when applied to the skin of rabbits
GLP compliance:
not specified

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
other: amorphous powder
Details on test material:
Name of the test chemical: Tetrasodium [μ-[[3,3'-[(3,3'-dihydroxy[1,1'-biphenyl]-4,4'-diyl)bis(azo)]bis[5-amino-4-hydroxynaphthalene-2,7-disulphonato]](8-)]]dicuprate(4-)
Common Name: C.I Direct Blue 218
IUPAC name: tetrasodium (3E)-5-amino-3-{2-[4-(4-{2-[(2E)-8-amino-1-oxo-3,6-disulfonato-1,2-dihydronaphthalen-2-ylidene]hydrazin-1-yl}-3- hydroxyphenyl)-2-hydroxyphenyl]hydrazin-1-ylidene}-4-oxo-3,4-dihydronaphthalene-2,7-disulfonate dicopper
Molecular Formula: C32H20Cu2N6Na4O16S4
Molecular Weight: 1087.84 g/mol
SMILES Notation: c12c3c(c(S(=O)(=O)[O-])cc1cc(S(=O)(=O)[O])cc2N)N=Nc1ccc(cc1O[Cu]O3)c1cc2c(N=Nc3c(cc4c(c3O[Cu]O2)c(cc(c4)S(=O) (=O)[O-])N)S(=O)(=O)[O-])cc1.[Na+].[Na+].[Na+].[Na+]
InChI: 1S/C32H24N6O16S4.2Cu.4Na/c33-19-11-17(55(43,44)45)5-15-9-25(57(49,50)51)29(31(41)27(15)19)37-35-21-3-1-13(7-23(21)39) 14-2-4-22(24(40)8-14)36-38-30-26(58(52,53)54)10-16-6-18(56(46,47)48)12-20(34)28(16)32(30)42;;;;;;/h1-12,39-42H,33-34H2,(H,43,44,45)(H,46,47,48)(H,49,50,51)(H,52,53,54);;;;;;/q;2*+2;4*+1/p-8/b37-35-,38-36-;;;;;;
Substance Type: Organic
Physical State: Solid Deep purple to dark blue amorphous powder
Specific details on test material used for the study:
Name of the test chemical: Copper,[tetrahydrogen-3,3'-[(3,3'-dihydroxy-4,4'-biphenylylene)bis(azo)]bis[5-amino-4-hydroxy-2,7-naphthalenedisulfonato](4-)]di-,tetrasodium salt (7CI)
Common Name: C.I Direct Blue 218
Molecular Formula: C32H20Cu2N6Na4O16S4
Molecular Weight: 1087.84 g/mol
SMILES Notation: c12c3c(c(S(=O)(=O)[O-])cc1cc(S(=O)(=O)[O])cc2N)N=Nc1ccc(cc1O[Cu]O3)c1cc2c(N=Nc3c(cc4c(c3O[Cu]O2)c(cc(c4)S(=O)(=O)[O-])N)S(=O)(=O)[O-])cc1.[Na+].[Na+].[Na+].[Na+]
InChI: 1S/C32H24N6O16S4.2Cu.4Na/c33-19-11-17(55(43,44)45)5-15-9-25(57(49,50)51)29(31(41)27(15)19)37-35-21-3-1-13(7-23(21)39)14-2-4-22(24(40)8-14)36-38-30-26(58(52,53)54)10-16-6-18(56(46,47)48)12-20(34)28(16)32(30)42;;;;;;/h1-12,39-42H,33-34H2,(H,43,44,45)(H,46,47,48)(H,49,50,51)(H,52,53,54);;;;;;/q;2*+2;4*+1/p-8/b37-35-,38-36-;;;;;;
Substance Type: Organic
Physical State: Solid
Code Number -2146-00
Product Name - Lumisol Blue VG
Concentration:100%
Mix Number - 384
TR r-number - 78-638
Description - Dark Grey Powder





Test animals

Species:
rabbit
Strain:
New Zealand White
Details on test animals and environmental conditions:
TEST ANIMALS
- Weight at study initiation: approximately 2.5 kg
- Housing: housed individually in suspended wire mesh cages
- Diet (e.g. ad libitum): Purina Rabbit Chow, ad libitum
- Water (e.g. ad libitum): water, ad libitum
- Acclimation period: at least seven days equilibration

Test system

Type of coverage:
occlusive
Preparation of test site:
clipped
Remarks:
intact and abraded skin
Vehicle:
unchanged (no vehicle)
Controls:
not specified
Amount / concentration applied:
0.5 g
Duration of treatment / exposure:
24 hours
Observation period:
The test sites were observed at 24 and 72 hours after removal of patches
Number of animals:
6
Details on study design:
Details on study design
TEST SITE
- Area of exposure: back of the rabbits
- % coverage: dry surgical gauze, one inch square. two layers thick.
- Type of wrap if used: adhesive tape; the trunk was wrapped wi th impervious ma terial


SCORING SYSTEM: The dermal reactions were scored by the Draize technique at 24, 72 hours and the Primary Irritation Index (PII) was calculated

Results and discussion

In vivo

Resultsopen allclose all
Irritation parameter:
erythema score
Basis:
mean
Time point:
24 h
Score:
0
Reversibility:
not specified
Remarks on result:
no indication of irritation
Irritation parameter:
edema score
Basis:
mean
Time point:
24 h
Score:
0
Reversibility:
not specified
Remarks on result:
no indication of irritation
Irritation parameter:
erythema score
Basis:
mean
Time point:
72 h
Score:
0
Reversibility:
not specified
Remarks on result:
no indication of irritation
Irritation parameter:
edema score
Basis:
mean
Time point:
72 h
Score:
0
Reversibility:
not specified
Remarks on result:
no indication of irritation
Irritant / corrosive response data:
No signs of erythema or edema were observed on the intact and abraded skin of the 6 rabbits after 24 and 72 hours of patch removal.

Any other information on results incl. tables

 

Table: Individual scores for the acute dermal irritation study

Observations

Rabbit number

Mean Score

 

 

1

2

3

4

5

6

 

Erythema and eschar formation

Intact skin -24 hours

0

0

0

0

0

0

0

Abraded skin – 24 hours

0

0

0

0

0

0

0

Intact skin – 72 hours

0

0

0

0

0

0

0

Abraded skin – 72 hours

0

0

0

0

0

0

0

Edema

Intact skin – 24 hours

0

0

0

0

0

0

0

Abraded skin – 24 hours

0

0

0

0

0

0

0

Intact skin – 72 hours

0

0

0

0

0

0

0

Abraded skin - 72 hours

0

0

0

0

0

0

0

Sum of the mean scores

0

 Primary Dermal Index = sum of the mean scores/4 = 0.0

Applicant's summary and conclusion

Interpretation of results:
other: not irritating
Conclusions:
No signs of erythema or edema were observed on the intact and abraded skin of the 6 rabbits after 24 and 72 hours of patch removal.
The Primary Irritation Index was calculated to be 0.0.
Based on the scores and observations, it was concluded that C.I. Direct Blue 218[CAS: 28407-37-6] was not irritating to skin.
Executive summary:

A study was performed in rabbits to determine the dermal irritation potential of C.I. Direct Blue 218. The study was conducted as per 16 CFR 1500.41 &16 CFR 1500.3 Guidelines.6 New Zealand white rabbits were used for the study. After at least seven days of equilibration, the back and sides of each rabbit were clipped free of fur with an electric clipper. Rabbits with dermal lesions or irritation were replaced. One day after clipping, the left side of the spinal column was abraded (minor incisions which did not disturb the derma or produce bleeding). 0.5 g of the test material was applied to the intact and abraded skin of the back of the rabbits. The material was covered with dry surgical gauze, one inch square, two layers thick. The patches were secured with adhesive tape; the trunk was wrapped with impervious material. After 24 hours, the patches were removed. The dermal reactions were scored by the Draize technique at 24 and 72 hours. The primary dermal index was calculated.

No signs of erythema or edema were observed on the intact and abraded skin of the 6 rabbits after 24 and 72 hours of patch removal. 

The Primary Irritation Index was calculated to be 0.0.

Based on the scores and observations, it was concluded that C.I. Direct Blue 218 [CAS: 28407-37-6] was not irritating to skin.