 Home > Encyclopedia > Acid black 24

Acid black 24

Acid black 24 structure

CAS No:
3071-73-6
Formula:
C36H25N5O6S2.2Na
Chemical Name:
Acid black 24
Synonyms:
1-Naphthalenesulfonic acid,8-(phenylamino)-5-[2-[4-[2-(5-sulfo-1-naphthalenyl)diazenyl]-1-naphthalenyl]diazenyl]-,sodium salt (1:2);C.I. Acid Black 24;C.I. Acid Black 24,disodium salt;1-Naphthalenesulfonic acid,8-(phenylamino)-5-[[4-[(5-sulfo-1-naphthalenyl)azo]-1-naphthalenyl]azo]-,disodium salt;C.I. 26370;Acid Fast Black 2A;Acid Fast Black 8BX;Acid Leather Black 3B;Acilan Fast Black 3BN;Alphanol Black BBN;Alphanol Black GV;Amacid Milling Black S 2B;Amacid Milling Black DN;Amacid Milling Black SB;Amacid Milling Black SG;Azo Cyanine Black B;Azo Cyanine Black BB;Benzyl Fast Black B;Benzyl Fast Black 3B;Benzyl Fast Black CIB;Bucacid Black 2B;Cirene Black BRA;Cloth Black MB;Colacid Fast Black 2A;Coomassie Fast Black B;Cyanine Fast Black 2B;Durol Black B;Durol Black 2B;Durol Black BA;Cyanine Fast Black 2BG;Eniacid Cloth Black BR;Eriosin Fast Black B;Eriosin Fast Black 2B;Ext D and C Black No. 1;Fast Acid Black 2A;Fast Acid Black 2B;Fenazo Black SB;Folan Fast Black B;Hispacid Fast Black 2B;Java Milling Black B;Midlon Black P 2B;Milling Black BB;Milling Fast Black 2B;Naphthazine Sulphon Black D;Naphthazine Sulphon Black BC;Neutral Black 3B;Neutral Sulphonyl Navy N;Optanol Cyanine Black B;Optanol Cyanine Black BB;Polycor Dark Blue B;Pontacyl Fast Black BBN;Pontacyl Fast Black BBO;Shikiso Acid Fast Black 8BX;Sulfon Black S;Sulfonine Black B;Sulfonine Black BB;146838-10-0
Categories:
Dyes and Pigments > Dye

Request for Quotation

Acid black 24 Basic Attributes

Molecular Weight：

731.71

Exact Mass：

731.088501

EC Number：

221-343-4

Characteristics

PSA：

192.63000

XLogP3：

11.76340

Safety Information

wgk germany：

RTECS Number：

AQ4220000

Precautionary statement(s)：

P264, P270, P273, P280, P301+P312, P305+P351+P338, P330, P337+P313, P501

Hazard Statements：

H302

GHS Classification：

|Warning|H302 (11.27%): Harmful if swallowed [Warning Acute toxicity, oral]|P261, P264, P270, P272, P273, P280, P301+P312, P302+P352, P305+P351+P338, P321, P330, P333+P313, P337+P313, P363, and P501|Aggregated GHS information provided by 78 companies from 7 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Drug Information

MeSH Entry Terms：

acid black 24

Acid black 24 Use and Manufacturing

Methods of Manufacturing

Using lauric acid, 1-naphthylamine and N-Phenyl peri acid as raw materials, first diazotize lauren acid, couple with 1-naphthylamine, and then diazotize the coupled product , Coupling with N-phenyl cyclic acid to obtain the product. The finished product is obtained by salting out, filtering, drying and crushing. . Add 150kg of hydrochloric acid (industrial product) and 300kg of ice to the diazonium pot. Add 16% lauric acid solution (104.1kg containing lauren acid) and 30% sodium nitrite solution (33.3kg containing NaNO2) below 10°C. Add in 2h, and continue to stir for 2h. Transfer this diazonium liquid to the coupling pot, lower the temperature to 5℃, add 1-naphthylamine hydrochloride solution (made up of 63kg 1-naphthylamine, 64kg 30% hydrochloric acid and 450L water) within 10min, and continue after adding Stir at 10-12°C for 2h. Then gradually adjust the pH to 9 in batches with 10% liquid caustic soda. Transfer the above monoazo compounds to the diazonium pot, add ice to cool to 2-3°C, add 30% sodium nitrite solution (containing NaNO2 37.4kg), stir well, add 22.5% sulfuric acid 520kg, maintain 5-8°C , Stir for 2h, then add salt to salt out, filter, and beat the filter cake with 450L ice water to form a suspension. Add 1000L of water and 128kg of N-phenyl peri-acid in the coupling pot, dissolve at 80-85℃, and adjust the pH to 6 with hydrochloric acid and sodium acetate solution respectively. Dilute with water to 1500L, add the above suspension within 2h, and adjust the pH to 4.4-4.6 with sodium acetate solution at any time. After adding, continue stirring for 4h. Then adjust the pH to 8-8.2 with liquid caustic soda. Add salt to salt out, filter, dry, and crush to get about 805kg.

Uses

Mainly used for dyeing wool and wool/viscose blended fabrics

Manufacturing Info：

1-Naphthalenesulfonic acid, 8-(phenylamino)-5-[2-[4-[2-(5-sulfo-1-naphthalenyl)diazenyl]-1-naphthalenyl]diazenyl]-, sodium salt (1:2): ACTIVE

Computed Properties

Molecular Weight:731.7
Hydrogen Bond Donor Count:1
Hydrogen Bond Acceptor Count:11
Rotatable Bond Count:6
Exact Mass:731.08851438
Monoisotopic Mass:731.08851438
Topological Polar Surface Area:193
Heavy Atom Count:51
Complexity:1370
Covalently-Bonded Unit Count:3
Compound Is Canonicalized:Yes

Material

Sodium hydroxide

1-Naphthylamine

SODIUM SULFATE

Sodium acetate trihydrate

Sodium nitrite

Hydrochloric acid

Sulfuric acid

Sodium sulfate