Detail of "6471-78-9"

CAS Number:
6471-78-9
Name:
Benzenesulfonic acid,4-amino-5-methoxy-2-methyl-
Superlist Name:
4-Amino-5-methoxy-2-methylbenzensulfonic acid
Molecular Structure:
Formula:
C₈H₁₁NO₄S
Molecular Weight:
217.24
Synonyms:
o-Toluenesulfonicacid, 4-amino-5-methoxy- (8CI);2-Methoxy-5-methyl-4-sulfoaniline;2-Methyl-4-amino-5-methoxybenzenesulfonic acid;4-Amino-5-methoxy-o-toluenesulfonic acid;Cresidine-p-sulfonic acid;
EINECS:
229-319-5
Density:
1.403 g/cm³
Risk Codes:
20/21/22-36/37/38
Safety:
26-36/37/39 Details
particular:
particular

Azo pigment lakes: Azo pigment lakes. Hotta, Seishi; Kuriyama, Takayoshi (Sumika Color Co., Ltd., Japan). Jpn. Kokai Tokkyo Koho JP 61123668 A2 11 Jun 1986 Showa, 4 pp. (Japan) CODEN: JKXXAF. CLASS: ICM: C09B031-00. APPLICATION: JP 84-244061 19 Nov 1984. DOCUMENT TYPE: Patent CA Section: 41 (Dyes, Organic Pigments, Fluorescent Brighteners, and Photographic Sensitizers) Section cross-reference(s): 42 The title pigments, better than Watchung red in gravure and flexog. 6471-78-9 and 106060-76-8 which are cas registry numbers are also used here. inks, are prepd. by coupling diazotized RR1R2C6H2NH2 (R = AcNH, alkoxy, NO2; R1 = CO2H, SO3H; R2 = H, Me) and diazotized 3-chloro-4-methylaniline-6-sulfonic acid (I) with 3-hydroxy-2-naphthoic acid (II) and laking the coupled pigment. Thus, an aq. mixt. of I and p-anisidine-o-sulfonic acid was diazotized and coupled with II, neutralized, and laked with SrCl2 at 50°. The lake was kneaded with an aq. varnish and printed to give a bluish-carmine with good fastness. .

Purification of cresidinesulfonic acid by solvent extraction: Purification of cresidinesulfonic acid by solvent extraction. Grotta, Henry M.; Gaughan, Perry J. (Buffalo Color Corp., USA). U.S. US 4436625 A 13 Mar 1984, 3 pp. (English).There are some reagents with their cas registry numbers 6471-78-9 and 120-71-8 are used in this study. (United States of America). CODEN: USXXAM. CLASS: IC: B01D011-04. NCL: 210634000. APPLICATION: US 81-319607 9 Nov 1981. DOCUMENT TYPE: Patent CA Section: 25 (Benzene, Its Derivatives, and Condensed Benzenoid Compounds) Cresidine was removed from impure p-cresidinesulfonic acid (I) contg. from ~2 ppb to ~1500 ppm cresidine by contacting aq. impure I with sufficient liq. C5-18 hydrocarbon to give I contg. <2 ppb cresidine. In an example, impure I soln. contg. slightly over 1000 ppm cresidine was extd. with 3 portions hexane to give I with no detectable cresidine. .