O Toluenesulfonic acid

Amino-o-toluenesulfonic acid, a206 2-Amino-1,1,3-tricyanopropene, a267 1 -Aminotricyclo[3.3.l3 7]decane, a65 Aminouracil, al53 2-Aminovaleric acid, a248 5-Aminovaleric acid, a249 AMP, a216... 

Amino-5-methoxy-o-toluenesulfonic Acid Not more than 0.2%. 

C7H803 allylsuccinic anhydride 7539-12-0 474.75 41.463 2 11020 C7H9N03S 4-amino-o-toluenesulfonic acid 133-78-8 773.15 70.660 2... 

Bromcresol Purple. 4,4 -<3H-2rI Benzoxathiob3-ylidene)bis[2-bromo 6-tnethy(phenolJ S, 5-dioxide a-(S-bro ma 4-hydroxy m tolyI) a -<3-6romo-5-mefhyi-4-oxo-2,5-cy-clohexadien-l-ylidene)-o-toluenesulfonic acid 5,5 -drbro-mo-o-cresolsulfonphthalein. C H Br-OcS mol wt 540-24. C 46.68%, H 2.99%. Br 29.59%, O 14.81%, S 5.94%. Prepd by treating o-cresol red with bromine in glacial acetic acid See refs under Bromcresol Green. 

Beilstein Handbook Reference) BCG BRN 0372527 Bromcresol green EINECS 200-972-8 NSC 7817 Phenol, 4,4 - 1,1-dioxido-3H-2,1-benz-oxathiol-3-ylidene)bis(2,6-dibromo-3-methyl- Phenol, 4,4 -(3H-2,1-benzoxathiol-3-ylidene)bis(2,6-dibromo-3-methyl-, S,S-dioxide o-Toluenesulfonic acid, o-hydroxy-, gamma-sultone Tetrabromo-m-cresolphthalein sulibne. An acid indicator pH 3.8 (yellow)-5.4 (blue-green). Red-yellow crystals mp = 218.5° Xjn = 211, 278, 338,426 nm (e 54100. 8500, 7550, 17100 MeOH), 312, 394, 620 nm (s 13300, 8520, 40100 MeOH/KOH) insoluble in H2O, soluble in organic solvents. Lancaster Synthesis Co. Mallinckrodt Inc. Sigma-Aldrich Fine Chem. 

Other Names Bromochlorophenol blue Phenol, 4,4 -(3H-2,l-benzoxathiol-3-ylidene) [2-bromo-6-chloro-, S,S-dioxide o-Toluenesulfonic acid, a,a-fci5 (3-bromo-5-chloro-4-hydroxyphenyl)-a-hydroxy-, y-sultone 3H-2,l-Benzoxathiole, phenol deriv. Bromchlorophenol blue NSC 7816 CA Index Name Phenol, 4,4 -(l,l-dioxido-3H-2,l-benzoxathiol-3-ylidene)fcw[2-bromo-6-chloro-CAS Registry Number 2553-71-1 Merck Index Number Not listed Chemical Structure... 

Identify the substituent present on the ring, and decide whether it is ortho-and para-directing or meta-directing. According to Figure 9.16, an alkyl substituent is ortho- and para-directing, so sulfonation of toluene will give primarily a mixture of o-toluenesulfonic acid and p-toluenesulfonic acid. 

One interesting feature of the sulfonation reaction with sulfuric acid is that the temperature plays a striking role in the orientation. This effect has been examined most extensively in the siJfonation of toluene and of naphthalene. In the sulfonation of toluene at 0° three isomers are produced in the following proportions o-toluenesulfonic acid, 43% m-toluenesulfonic acid, 4% p-toluenesulfonic acid, 53%. At this temperature there is only a slight preference, for para substitution over ortho substitution. In the sulfonation at 100° the yields are 13% o-toluene-sulfonic acid, 8% m-toluenesulfonic acid, and 79% p-toluenesulfonic... 

H-2 1-Benzoxathio-3-ylidene)bis[2y6-dibromophenol -S,S dioxide, 9CI, SCI. (Xy(x-Bis 3,5-dibromo-4-hydroxyphenyl)-(x-hydroxy-O toluenesulfonic acid y-sultone. Tetrabromosulfonephthalein [115-39-9]... 

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