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18523-16-5

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18523-16-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 18523-16-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,8,5,2 and 3 respectively; the second part has 2 digits, 1 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 18523-16:
(7*1)+(6*8)+(5*5)+(4*2)+(3*3)+(2*1)+(1*6)=105
105 % 10 = 5
So 18523-16-5 is a valid CAS Registry Number.

18523-16-5Relevant articles and documents

Preparation method of 1,3,5-trialkoxy-2,4,6-trinitrobenzene

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Paragraph 0024-0059, (2021/10/27)

The invention discloses a preparation method of 1,3,5-trimethoxy-2,4,6-trinitrobenzene. The method comprises the following steps: dissolving trinitrophloroglucinol in an alkylating reagent with the mass being 5 times that of the trinitrophloroglucinol to obtain a raw material solution; pumping the raw material solution into a continuous flow tubular reactor I, and reacting at 80-110 DEG C for 5-30 minutes to obtain an alkylation reaction solution; feeding the alkylation reaction liquid into a continuous flow tubular reactor II for cooling for 5-10 minutes, wherein the cooling temperature is 20-30 DEG C; and taking out the product, adding the product into a devitrification solution, and performing cooling, devitrifying, stirring, filtering and drying to obtain a product 1,3,5-trimethoxy-2,4,6-trinitrobenzene, wherein the alkylating reagent is a methylation reagent or an ethylation reagent or a propylation reagent. A continuous flow technology is used for inhibiting side reaction, the yield and purity of a target product are improved, and the post-treatment process is greatly simplified. The method can easily control reaction process and is suitable for industrial production.

Method for TORTNB etherification synthesis in microreactor

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Paragraph 0023; 0024, (2019/04/06)

The invention discloses a method for TORTNB etherification synthesis in microreactor. The method includes steps: dissolving a nitrification product TNPG into an organic solvent; simultaneously pumpingTNPG solution and an etherification into a micro mixer,

Synthesis of trinitroaromatics using alternative mixed acid nitration conditions

Straessler, Nicholas A.

experimental part, p. 2513 - 2519 (2010/09/14)

Conditions for the mild and efficient nitration of phloroglucinol (1,3,5-trihydroxybenzene), 5-methoxyresorcinol, 3,5-dimethoxyphenol, and 1,3,5-trimethoxybenzene have been developed. Yields of the trinitro derivatives are excellent (~90%) for systems hav

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