ACID GREEN 20 (C.I. 20495)

Name	Acid Green 20
Synonyms	CI NO 20495 Acid Green 20 Dark Green B C.I.Acid Green 20 Acid Dark Green 6B AMIDO GREEN BLACK B Amido Green Black B Atlacid Dark Green B ACID GREEN 20 (C.I. 20495) disodium 4-amino-3-(4-aminophenyl)azo-5-hydroxy-6-phenylazo-naphthalene-2,7-disulfonate Disodium 4-amino-3-((4-aminophenyl)azo)-5-hydroxy-6-(phenylazo)naphthalene-2,7-disulphonate disodium 4-amino-3-[(4-aminophenyl)azo]-5-hydroxy-6-(phenylazo)naphthalene-2,7-disulphonate 2,7-Naphthalenedisulfonic acid, 4-amino-3-((4-aminophenyl)azo)-5-hydroxy-6-(phenylazo)-, disodium salt 2,7-Naphthalenedisulfonic acid, 4-amino-3-((p-aminophenyl)azo)-5-hydroxy-6-(phenylazo)-, disodium salt disodium (3E)-5-amino-6-[(E)-(4-aminophenyl)diazenyl]-4-oxo-3-(2-phenylhydrazinylidene)-3,4-dihydronaphthalene-2,7-disulfonate
CAS	5850-39-5
EINECS	227-452-3
InChI	InChI=1/C22H18N6O7S2.2Na/c23-13-6-8-15(9-7-13)26-27-20-16(36(30,31)32)10-12-11-17(37(33,34)35)21(22(29)18(12)19(20)24)28-25-14-4-2-1-3-5-14;;/h1-11,29H,23-24H2,(H,30,31,32)(H,33,34,35);;/q;2*+1/p-2

Molecular Formula	C22H16N6Na2O7S2
Molar Mass	586.51
Melting Point	>300℃
Storage Condition	Room Temprature
Physical and Chemical Properties	Dark blue green to green black powder. It is soluble in water, the aqueous solution is dark blue green, and the addition of concentrated sodium hydroxide solution is purple. Soluble in ethylene glycol ether, ethanol-soluble, insoluble in other organic solvents. Dye in 10% sodium hydroxide solution was purple solution; In concentrated sulfuric acid was blue green, diluted blue, with precipitation; In concentrated nitric acid Brown solution.
Use	Mainly used for dyeing wool and silk

Raw Materials

EPA chemical substance information	information provided by: ofmpeb.epa.gov (external link)
Use	acid dark green B is suitable for dyeing wool, silk and wool blended fabrics. It is also used for direct printing of wool, silk and nylon fabrics. For wool and other fibers in the same bath dyeing, acetate fiber does not stain, cellulose fiber slightly stained. When staining, the color of copper ion was almost unchanged, and the color of iron ion was light and dark. Medium discharge. Can also be used for leather, paper coloring. mainly used for dyeing wool and silk
production method	using p-nitroaniline, H acid and aniline as raw materials, P-nitroaniline was first diazotized and first coupled with H acid, the aniline is then diazotized, a second coupling is carried out with the aforementioned monoazo compound, and finally the nitro group is reduced with sodium sulfide to give the product. After salting out, filtration, drying, grinding to get the finished product...

Last Update：2024-04-09 21:11:58

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Product Name: Acid green 20 Visit Supplier Webpage Request for quotation
CAS: 5850-39-5
Tel: 609-228-6898
Email: sales@medchemexpress.com
　　　　 tech@medchemexpress.com
Mobile: 609-228-6898

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ACID GREEN 20 (C.I. 20495)

Raw Materials for ACID GREEN 20 (C.I. 20495)

Sulfamic acid
Sodium carbonate
Hydrochloric acid

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