4-Diazodiphenylamine sulfate

Synonym(s):4-Aminodiphenylamine diazonium sulfate;4-Diazodiphenylamine sulfate;Azoic Diazo Component 22;Azoic Diazo No. 22

CAS NO.：4477-28-5
Empirical Formula: C12H11N3O4S
Molecular Weight: 293.3
MDL number: MFCD00011895
EINECS: 224-756-8
SAFETY DATA SHEET (SDS)
Update Date: 2026-01-13 11:21:50

What is 4-Diazodiphenylamine sulfate?

What are the applications of Application

Variamine Blue RT Salt is a stain with color index: 37240

Flammability and Explosibility

Not classified

Purification Methods

Dissolve 10g of the dye in 100mL of hot water. Sodium dithionite (0.4g) is then added, followed by active carbon (1.5g) and is filtered hot. To the colourless or slightly yellow filtrate a solution of saturated NaCl is added, and the mixture is cooled. The needles are filtered off, washed with cold water, dried at room temperature, and stored in a dark bottle (light sensitive). [Anderson & Steedly J Am Chem Soc 76 5144 1954, Erdey Chem Analyst 48 106 1959, Beilstein 16 H 602, 16 I 371, 16 II 307, 16 III 575. ]

Properties of 4-Diazodiphenylamine sulfate

Boiling point:	623.17℃[at 101 325 Pa]
Density	1.512[at 20℃]
vapor pressure	0Pa at 25℃
Colour Index	37240
Water Solubility	21.24g/L at 20℃
CAS DataBase Reference	4477-28-5(CAS DataBase Reference)
EPA Substance Registry System	Benzenediazonium, 4-(phenylamino)-, sulfate (1:1) (4477-28-5)

Safety information for 4-Diazodiphenylamine sulfate

Signal word	Danger
Pictogram(s)	Corrosion Corrosives GHS05 Health Hazard GHS08 Environment GHS09
GHS Hazard Statements	H315:Skin corrosion/irritation H318:Serious eye damage/eye irritation H341:Germ cell mutagenicity H400:Hazardous to the aquatic environment, acute hazard
Precautionary Statement Codes	P202:Do not handle until all safety precautions have been read and understood. P273:Avoid release to the environment. P280:Wear protective gloves/protective clothing/eye protection/face protection. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. P308+P313:IF exposed or concerned: Get medical advice/attention.