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Direct Orange 26

Direct Orange 26 structure

CAS No:
3626-36-6
Formula:
C33H24N6O9S2.2Na
Chemical Name:
Direct Orange 26
Synonyms:
2-Naphthalenesulfonic acid,7,7′-(carbonyldiimino)bis[4-hydroxy-3-(2-phenyldiazenyl)-,sodium salt (1:2);C.I. Direct Orange 26;C.I. Direct Orange 26,disodium salt;2-Naphthalenesulfonic acid,7,7′-(carbonyldiimino)bis[4-hydroxy-3-(phenylazo)-,disodium salt;C.I. 29150;Airedale Orange SED;Aizen Primula Orange SH;Atlantic Fast Orange S;Benzanil Fast Orange SE;Benzo Fast Orange S;Benzo Orange S;Benzo Viscose Orange RL;Brilliant Direct Orange;Brilliant Direct Orange A-CF;Calcomine Fast Orange 2R;Chloramine Fast Orange S;Chloramine Fast Orange SE;Chrome Leather Orange SE;Diacotton Fast Orange S;Diamine Fast Orange S;Diaphtamine Fast Orange S;Diazol Fast Orange S;Diazol Fast Orange SS;Diphenyl Fast Orange SE;Diphenyl Orange SE;Direct Fast Orange S;Direct Fast Orange MS;Direct Fast Orange SE;Direct Fast Orange SN;Direct Orange A;Direct Orange S;Enianil Brilliant Orange S;Erie Fast Orange A;Fast Orange S;Fast Paper Orange SO;Fenamin Orange A;Hispamin Fast Orange S;Kayaku Direct Fast Orange S;Mitsui Direct Fast Orange S;Nippon Fast Orange S;Nyanza Fast Orange S;Paramine Fast Orange S Extra;Paramine Fast Orange S New;Phenamine Brilliant Orange A;Pheno Fast Orange 2RS;Pontamine Fast Orange S;Tertrodirect Orange S;Vondacel Orange SN;Chlorazol Fast Orange R;Direct Brilliant Orange;Brilliant Orange;Kayafect Orange S;Orbamin Orange S;Diphenyl Orange 5G;Direct Orange 26
Categories:
Dyes and Pigments > Dye

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Direct Orange 26 Basic Attributes

Molecular Weight：

756.67212

Exact Mass：

756.068481

EC Number：

222-838-8

Characteristics

PSA：

262.19000

XLogP3：

9.99480

Appearance：

red brown powder

Density：

450 - 500 kg/m3

Safety Information

GHS Classification：

|Warning|H302 (16.67%): Harmful if swallowed [Warning Acute toxicity, oral]|P261, P264, P270, P271, P280, P301+P312, P302+P352, P304+P312, P304+P340, P305+P351+P338, P312, P321, P322, P330, P332+P313, P337+P313, P362, P363, and P501|Aggregated GHS information provided by 20 companies from 3 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Direct Orange 26 Use and Manufacturing

Methods of Manufacturing

Using scarlet acid (5, 5'-dihydroxy-2, 2'-dinaphthylurea-7, 7'-disulfonic acid) and aniline as raw materials, first diazotize the aniline, and then couple with scarlet acid to obtain the product, After salting out, filtering, drying and crushing, the finished product is obtained. . After diazotizing 19.5kg aniline (100%), 26kg sulfuric acid (100%), 14.5kg sodium nitrite (100%), 240kg water, and 50.4kg scarlet acid (100%), 26.95kg sodium carbonate ( 100%), 3.91kg of sodium hydroxide (100%), 200kg of water for coupling reaction, then salting out, pressure filtration, drying to obtain about 100-110kg product.

Uses

Used for dyeing cotton, linen, viscose and other fabrics, and also for dyeing silk, nylon and pulp

Manufacturing Info：

2-Naphthalenesulfonic acid, 7,7'-(carbonyldiimino)bis[4-hydroxy-3-(2-phenyldiazenyl)-, sodium salt (1:2): ACTIVE

Use Classification：

EPA Safer Chemical Functional Use Classes -> Colorants|Safer Chemical Classes -> Yellow triangle - The chemical has met Safer Choice Criteria for its functional ingredient-class, but has some hazard profile issues

Computed Properties

Molecular Weight:756.7
Hydrogen Bond Donor Count:4
Hydrogen Bond Acceptor Count:13
Rotatable Bond Count:6
Exact Mass:756.06850721
Monoisotopic Mass:756.06850721
Topological Polar Surface Area:262
Heavy Atom Count:52
Complexity:1310
Covalently-Bonded Unit Count:3
Compound Is Canonicalized:Yes

Material

Sodium carbonate

Aniline

Sodium nitrite

Sulfuric acid