Name | Toluidine Red |
Synonyms | C.I. 12120 Toluidine Red Pigment Red 3 C.I.Pigmentred3 Basoflex Red 361 adctoluidineredb atlasolspiritred3 C.I. Pigment Red 3 C.I.PigmentRed3(12120) C.I. Pigment Red 3 (8CI) toluidine red (C.I. 12120) ((4-Methyl-2-nitrophenyl)azo)-2-naphthol 1-(4-Methyl-2-nitrophenylazo)-2-naphthol 1-((2-nitro-4-methylphenyl)azo)-2-naphthol 1-[(4-methyl-2-nitrophenyl)hydrazono]naphthalen-2(1H)-one (1Z)-1-[(4-methyl-2-nitrophenyl)hydrazono]naphthalen-2(1H)-one |
CAS | 2425-85-6 |
EINECS | 219-372-2 |
InChI | InChI=1/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/h2-10,18H,1H3/b19-17- |
Molecular Formula | C17H13N3O3 |
Molar Mass | 307.3 |
Density | 1.1873 (rough estimate) |
Melting Point | 270-272°C(lit.) |
Boling Point | 447.81°C (rough estimate) |
Flash Point | 251.3°C |
Water Solubility | 211μg/L at 20℃ |
Vapor Presure | 8.02E-10mmHg at 25°C |
Appearance | neat |
pKa | 13.45±0.50(Predicted) |
Stability | Stable. May be moisture sensitive. Incompatible with strong oxidizing agents. |
Refractive Index | 1.6500 (estimate) |
Physical and Chemical Properties | solubility: slightly soluble in ethanol, acetone, benzene, dark red-purple in concentrated sulfuric acid, orange precipitation after dilution; Dark vermilion in case of concentrated nitric acid; in dilute sodium hydroxide does not change. hue or color: yellow Red relative density: 1.34-1.52 Bulk density/(lb/gal):11.1-12.6 melting point/℃:276-278 average particle size/μm:0.26-0.53 particle shape: rod-like specific surface area/(m2/g):8-25 pH value/(10% slurry):6.0-7.1 oil absorption/(g/100g):33-80 hiding power: translucent diffraction curve: reflection curve: This product is bright red powder, melting point 258 ℃, fine powder, high coloring power and hiding power Good heat resistance, acid and alkali resistance, soluble in concentrated sulfuric acid for Deep Purple, diluted orange precipitation. Dissolved in concentrated nitric acid is dark red, dilute sodium hydroxide does not change color, slightly soluble in ethanol, acetone and grass. |
Use | Used for printing ink, paint, cultural materials coloring The pigment is also known as toluidine red, belonging to the larger varieties, large particle size of the dosage form is blue red, in the alkyd resin with the extension of drying time, the gloss decreased, resulting in light fog; Small particle size of yellow light, light fog phenomenon is not obvious; Light fastness 7, light color (1:4 TiO2) for the 4 level. It is mainly used in air self-drying paint hard PVC, less used for printing ink, and the number of products on the market is 95. it can be used for the coloring of mud, pencil, crayon, water color and oil color pigments and rubber products; It is also suitable for paint cloth, paint, plastic and natural lacquer, and brushing sand tube, coloring of arts and crafts and cosmetics. |
Risk Codes | R41 - Risk of serious damage to eyes R50/53 - Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. |
Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S39 - Wear eye / face protection. S60 - This material and its container must be disposed of as hazardous waste. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. |
UN IDs | UN 3077 9/PG 3 |
WGK Germany | 3 |
RTECS | QK4247000 |