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4477-28-5 Usage

Flammability and Explosibility


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. ]

Check Digit Verification of cas no

The CAS Registry Mumber 4477-28-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,4,7 and 7 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 4477-28:
105 % 10 = 5
So 4477-28-5 is a valid CAS Registry Number.

4477-28-5Relevant articles and documents

Synthesizing method for diazonium monomer 4-diazo diphenylamine disulfate


Paragraph 0019, (2016/10/10)

The invention discloses a synthesizing method for a diazonium monomer 4-diazo diphenylamine disulfate, and belongs to the technical field of synthesis of photosensitive compounds.The 4-diazo diphenylamine disulfate is prepared by taking an RT base, concentrated sulfuric acid and sodium nitrite as raw materials and dropwise adding concentrated sulfuric acid and sodium nitrite.In the reaction process, ethyl alcohol is not needed to serve as solvent, and 4-diazo diphenylamine salt does not need to be synthesized and then replaced with concentrated sulfuric acid.When 4-diazo diphenylamine disulfate is synthesized through the method, the cost is greatly lowered, the equipment utilization rate is increased, and the yield reaches 80% or above.

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