25641-18-3 Usage
Description
AZOCARMINE G, with the CAS number 25641-18-3, is an organic sodium salt characterized by its 7-phenyl-5-(4-sulfonatoanilino)benzo[a]phenazin-7-ium-3-sulfonate counterion. It is an organic dye known for its blue-ray red color, which becomes green in strong sulfuric acid and forms a red precipitate when diluted. AZOCARMINE G is soluble in water and exhibits various fastness properties, making it suitable for different applications.
Uses
Used in Chemical Analysis:
AZOCARMINE G is used as a redox indicator in titrations with chloramine-T. Its color-changing properties allow for accurate measurement and analysis in chemical reactions.
Used in Textile Industry:
AZOCARMINE G is utilized as a dye in the textile industry due to its light fastness, soaping fastness, perspiration fastness, and oxygen bleaching fastness. These properties ensure that the dye remains stable and resistant to fading and staining under various conditions.
Used in ISO Standards:
AZOCARMINE G conforms to ISO standards, with ratings of 3 for light fastness, 2-3 for soaping fastness, 2 for perspiration fastness, and 1-2 for oxygen bleaching fastness. These ratings indicate the dye's performance and suitability for different applications and conditions.
Preparation
4-(Phenyldiazenyl)naphthalen-1-amine with aniline and aniline hydrochloride heating, the resulting Phenyl Rosinduline fuming sulfuric acid with two stlfonation, again as sodium salt out of segregation.
Standard
Light Fastness
Fading
Stain
ISO
3
Check Digit Verification of cas no
The CAS Registry Mumber 25641-18-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,5,6,4 and 1 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 25641-18:
(7*2)+(6*5)+(5*6)+(4*4)+(3*1)+(2*1)+(1*8)=103
103 % 10 = 3
So 25641-18-3 is a valid CAS Registry Number.
InChI:InChI=1/C28H19N3O6S2/c32-38(33,34)20-12-10-18(11-13-20)29-25-17-27-28(22-15-14-21(16-23(22)25)39(35,36)37)30-24-8-4-5-9-26(24)31(27)19-6-2-1-3-7-19/h1-17H,(H2,32,33,34,35,36,37)/p-1
