 Home > Chemicals Industry > Chemical Technology > 2-Hydroxy-3-naphthoyl o-toluidine and product performance and production principle

2-Hydroxy-3-naphthoyl o-toluidine and product performance and production principle

 Last Update: 2021-08-28
 Source: Internet
 Author: User

Tags

lauric acid melting point

5 acetic acid

Search more information of high quality chemicals, good prices and reliable suppliers, visit www.echemi.com

2-hydroxy-3-naphthoyl-o-toluidide (2-hydroxy-3-naphthoyl-o-toluidide), also known as naphthol AS-D (naphtholAS-D), N-(3-hydroxy-2-naphthoyl-o-toluidide) ) O-toluidine, molecular formula is C ₁₈ H ₁₅ NO ₂ , molecular weight is 277.
28, structural formula is

Product performance

Beige powder; melting point 195～196℃; insoluble in water and soda ash, soluble in benzene and naphtha ; yellow in alkaline solution; toxic
.

2.
Production principle

2-Hydroxy-3-naphthoic acid forms a salt with soda ash and then dehydrated
.

Then, 2-hydroxy-3-naphthoate sodium (2,3-sodium) is condensed with o-toluidine under the catalysis of phosphorus trichloride , and the product is obtained by neutralization, desolvation, filtration and drying

Process flow

Technical formula (kg/t)

Main equipment

Salt formation pot, condensation reaction kettle, distillation kettle, storage tank, filter, dryer

This article is an English version of an article which is originally in the Chinese language on echemi.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to service@echemi.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

Related Products

polyether polyol, MW 3500, QC-5631B, 348, Cas No.: 9082-00-2

CAS No.: 9082-00-2

Industrial Grade

$1348-1368/MT FOB

PVC CAS No.9002-86-2

CAS No.: 9002-86-2

$880/MT FOB

MW 3500 polyether polyol for polyurethane flexible foam

CAS No.: 9082-00-2

Industrial Grade

$1348-1368/MT FOB

Hot Tags

united states jobs(223)

jobs united states(236)

1 year treasury(277)

1 year subscription(296)

announcements today(81)

80 20 company(94)

united states logo(227)

single use technology(195)

healthy food name(42)

ups united states(221)

Hot Articles

The source of this page with content of products and services is from Internet, which doesn't represent ECHEMI's opinion. If you have any queries, please write to service@echemi.com. It will be replied within 5 days.

Moreover, if you find any instances of plagiarism from the page, please send email to service@echemi.com with relevant evidence.