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Merck
CN

199753

Toluidine Red

Dye content 70 %

Synonym(s):

Pigment Red 3

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About This Item

Empirical Formula (Hill Notation):
C17H13N3O3
CAS Number:
2425-85-6
Molecular Weight:
307.30
PubChem Substance ID:
24851937
UNSPSC Code:
12171500
Colour Index Number:
12120
NACRES:
NA.47
EC Number:
219-372-2
MDL number:
MFCD00003910

Key Documents

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InChI key

ZLFVRXUOSPRRKQ-VHEBQXMUSA-N

InChI

1S/C17H13N3O3/c1-11-6-8-14(15(10-11)20(22)23)18-19-17-13-5-3-2-4-12(13)7-9-16(17)21/h2-10,21H,1H3/b19-18+

SMILES string

Cc1ccc(\N=N\c2c(O)ccc3ccccc23)c(c1)[N+]([O-])=O

form

powder

composition

Dye content, 70%

mp

270-272 °C (lit.)

λmax

398 nm, 507 nm (2nd)

application(s)

diagnostic assay manufacturing
hematology
histology

storage temp.

room temp

pictograms

CorrosionEnvironment
GHS05,GHS09

signalword

Danger

hcodes

H318,H410

Hazard Classifications

Aquatic Acute 1 - Aquatic Chronic 1 - Eye Dam. 1

Storage Class

11 - Combustible Solids

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
MKBH6850V
14296TJ
05314BE
05731EO
3217TE

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S A Larsen et al.
Journal of clinical microbiology, 17(2), 341-345 (1983-02-01)
Both the rapid plasma reagin (RPR) 18-mm circle card test and the toluidine red unheated serum test (TRUST) were designed to be more rapid than the Venereal Disease Research Laboratory slide test for the serodiagnosis of syphilis. The RPR card
Ying Jiang et al.
Sexually transmitted diseases, 38(3), 244-245 (2010-09-28)
We retrospectively analyzed the Venereal Disease Research Laboratory test, Treponema pallidum particle agglutination test, and toluidine red unheated serum test (TRUST) in 41 cases of HIV-negative neurosyphilis and 34 non-neurologic syphilitic patient and found that serum-TRUST titers could be the
CI Pigment Red 3.
IARC monographs on the evaluation of carcinogenic risks to humans, 57, 259-267 (1993-01-01)
D L Morgan et al.
Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association, 27(12), 793-800 (1989-12-01)
Treatment of F344 rats and B6C3F1 mice with C.I. Pigment Red 3 in the diet (10, 5.0, 2.5, 1.25, 0.6 or 0.3%) for 14 and 90 days resulted in haematological alterations consistent with haemolytic anaemia. Rats appeared to be more
C E Parham et al.
Journal of clinical microbiology, 20(3), 434-437 (1984-09-01)
The toluidine red unheated serum test (TRUST) antigen, a macroscopic flocculation test antigen developed by Pettit et al. (J. Clin. Microbiol. 18:1141-1145, 1983) by modifying the color-coded antigen of Kasatiya and Lambert (Appl. Microbiol. 28:317-318, 1974), was compared with the
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