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1,4-Naphthalenedione, 6-methyl-2-(phenylamino)-, also known as CI Direct Black 22 or Direct Black 22, is an organic compound with the chemical formula C20H15N2O2. It is a black dye used in the textile industry for dyeing cotton, wool, and silk. The compound consists of a naphthalene core with a methyl group at the 6th position, a phenylamine group at the 2nd position, and two carbonyl groups at the 1st and 4th positions. Direct Black 22 is known for its high color strength, good lightfastness, and excellent wet fastness properties. However, it is also classified as a hazardous substance due to its potential environmental and health risks, including aquatic toxicity and skin irritation.

63228-95-5

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63228-95-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 63228-95-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,3,2,2 and 8 respectively; the second part has 2 digits, 9 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 63228-95:
(7*6)+(6*3)+(5*2)+(4*2)+(3*8)+(2*9)+(1*5)=125
125 % 10 = 5
So 63228-95-5 is a valid CAS Registry Number.

63228-95-5Downstream Products

63228-95-5Relevant academic research and scientific papers

Synthesis and antiallergic activity of 2 hydroxy 3 nitro 1,4 naphthoquinones

Buckle,Cantello,Smith,Spicer

, p. 1059 - 1064 (1977)

A selection of novel 2-hydroxy-3-nitro-1,4-naphthoquinones are shown to be potent inhibitors of rat passive cutaneous anaphylaxis (PCA) and to have highest potency with alkyl substitution at both C-6 and C-7. The most potent compounds were 7c and 7e which produced a 50% inhibition in the rat PCA test at doses of about 10 μM/kg following subcutaneous administration and showed activity after oral administration. Related 4-hydroxy-3-nitro-2(1H)-naphthalenones had no effect on rat PCA in doses up to 500 μM/kg.

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