116-71-2
Vat Blue 20
CAS: 116-71-2
Molecular Formula: C34H16O2
116-71-2 - Names and Identifiers
| Name | Vat Blue 20 |
| Synonyms | C.I. 59800 VAT BLUE 20 Vat Blue 20 Violanthrone Dibenzanthrone C.I.Vat Blue 20 Pigment Blue 65 C.I. Vat Blue 20 Vat Dark Blue BO C.I. Pigment Blue 65 sandothrenedarkbluenbo Solanthrene Dark Blue B sandothrenedarkbluenmba sandothrenedarkbluenboa Solanthrene Dark Blue BA Vat Dark Blue BO UL Conc Solanthrene Dark Blue F-BA anthra[9,1,2-cde]benzo[rst]pentaphene-5,10-dione |
| CAS | 116-71-2 |
| EINECS | 204-152-0 |
| InChI | InChI=1/C34H16O2/c35-33-25-7-3-1-5-17(25)19-9-11-21-22-12-10-20-18-6-2-4-8-26(18)34(36)28-16-14-24(30(22)32(20)28)23-13-15-27(33)31(19)29(21)23/h1-16H |
116-71-2 - Physico-chemical Properties
| Molecular Formula | C34H16O2 |
| Molar Mass | 456.49 |
| Density | 1.1055 (rough estimate) |
| Melting Point | 338-339 °C |
| Boling Point | 522.64°C (rough estimate) |
| Appearance | Blue-black to black powder |
| Storage Condition | Sealed in dry,Room Temperature |
| Refractive Index | 1.4875 (estimate) |
| Physical and Chemical Properties | solubility: slightly soluble in tetrahydronaphthalene and xylene, red fluorescent liquid, slightly soluble in pyridine, acetone, chloroform and toluene, insoluble in ethanol; Purple-black in concentrated sulfuric acid, after dilution, it is blue-black precipitation; It is dark purple in alkaline powder solution, and the acid is dark red. hue or shade: Red light blue |
| Use | The pigment belongs to the condensed ketone vat dye pigment, gives red light blue tone, has excellent application fastness and heat stability, its light fastness is 7, mainly used in industrial coatings and plastic coloring. |
116-71-2 - Reference Information
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| use | reduced dark blue BO is mainly used for dyeing cotton fibers with good affinity, fast coloring and medium levelness. Less used for printing, more used for color matching. It can be used for dyeing silk, viscose fiber, viscose cotton and vitamin cotton, also for hot melt dyeing of polyester-cotton blended fabric and disperse dyes in the same bath, and also for preparing organic pigments. Mainly used for dyeing and printing of cotton fabrics |
| production method | benzoanthrone (benzanthrone) is used as raw material, and potassium hydroxide and sodium acetate are used in refined naphthalene medium for alkali fusion condensation. after recovering refined naphthalene, the finished product is refined.. |
Last Update：2024-04-10 22:29:15
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