Phosgene, viewed from the chemical structure, is a diacyl chloride derivative of carbonic acid. It is a very active electrophilic reagent and easy to hydrolyze. It is a severe asphyxiating toxic gas. Inhalation of high concentration can cause pulmonary edema. The toxicity is about 10 times greater than that of chlorine, but it has no accumulation effect in the body. Its common name is translated from Greek φως (light) + Γίνει (generated). Phosgene was originally produced by the decomposition of chloroform by light, so it has this name.

2-Hydroxy-6-Nitro-4-Sulfonaphthalene-1-Diazonium

CAS:50412-00-5

Molecular Formula:C10H5N3O6S

Alias

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Einecs 256-582-3; 1-Naphthalenediazonium,2-Hydroxy-6-Nitro-4-Sulfo; 2-Hydroxy-6-Nitro-4-Sulphonaphthalene-1-Diazonium; 6-Nitro-1-Diazo-2-Naphthol-4-Sulfonic acid; N-(Propan-2-Ylideneamino)Propanamide

Brief Introduction

It can be used as dye intermediate.

Naphthol AS-G

CAS:91-96-3

Molecular Formula:C22H24N2O4

Alias

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N,N'-Bis(Acetoacetyl)-o-Toluidine; N,N'-(3,3'-Dimethyl-4,4'-Biphenyldiyl)bis(3-Oxobutanamide); Butanamide, N,N‘-(3,3‘-Dimethyl[1,1‘-Biphenyl]-4,4‘-diyl)bis[3-oxo-; Naphthol AS-G;; Cibanaphthol AG;; Acna Naphthol G;; Diacetylacetotolidide;; Naphtanilide G;; Naphthanil G;; Naphthoide G

Brief Introduction

It is mainly used for dyeing and printing of cotton yarn, cotton fabric, artificial cotton, bath towel, viscose fiber, silk and acetate fiber. It can also be used to make fast pigment yellow, etc

Sodium Dihydroxytartrate

CAS:866-17-1

Molecular Formula:C4H4Na2O8

Alias

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Dihydroxytartaric acid Disodium salt; Tetrahydroxy-Bernsteinsaeure,Dinatrium-Salz; Dipotassium Tetrahydroxybutanedioate; Disodium Tetrahydroxysuccinate; Dinatriumdihydroxytartrat; Tetrahydroxy-Bernsteinsaeure,Dinatrium-Verbindung; Butanedioic acid,2,2,3,3-Tetrahydroxy-,Sodium salt (1:2); Disodium Dihydroxytartrate; Disodium,2,2,3,3-Tetrahydroxybutanedioate; Disodium 2,2,3,3-Tetrahydroxybutanedioate; Tetrahydroxysuccinic acid,Disodium salt

Brief Introduction

The product is an organic synthetic intermediate used for the synthesis of tartrazine [1934-21-0]. Tartaric acid, also known as lemon yellow, is an edible synthetic pigment with high safety.

2R Acid

Molecular Formula:C10H9NO7S2

Alias

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2-Amino-8-Naphthol-3,6-Disulfonic acid

Brief Introduction

This product is a dye intermediate used for preparing azo dyes

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