ChemicalBook >> CAS DataBase List >>2-Aminotoluene-5-sulfonic acid

2-Aminotoluene-5-sulfonic acid

2-Aminotoluene-5-sulfonic acid structure

CAS No.: 98-33-9

Chemical Name:: 2-Aminotoluene-5-sulfonic acid

Synonyms: OTS;4-AMINO-3-METHYLBENZENESULFONIC ACID;2-TOLUIDINE-5-SULFONIC ACID;6-Amino-m-toluensulfonic acid;4-Amino-3-methylbenzene-1-sulfonic acid;2-Amino-5-sulfotoluene;2-Methyl-4-sulfoaniline;3-methylsulphanilic acid;2-Aminotoluene-5-sulfoni;o-Toluidine-4-sulfonic acid

CBNumber:: CB4450302

Molecular Formula:: C7H9NO3S

Molecular Weight:: 187.22

MDL Number:: MFCD00025198

MOL File:: 98-33-9.mol

Last updated:2025-07-16 09:55:25

Request For Quotation

2-Aminotoluene-5-sulfonic acid Properties

Melting point	290°C
Density	1.3553 (rough estimate)
refractive index	1.6100 (estimate)
storage temp.	Storage temp. 2-8°C
pka	pK1: 3.125 (25°C)
form	powder
color	Faint beige to faint red/orange
Water Solubility	5g/L(20 ºC)
InChI	InChI=1S/C7H9NO3S/c1-5-4-6(12(9,10)11)2-3-7(5)8/h2-4H,8H2,1H3,(H,9,10,11)
InChIKey	WQTCZINVPXJNEL-UHFFFAOYSA-N
SMILES	C1(S(O)(=O)=O)=CC=C(N)C(C)=C1
LogP	0.076 at 25℃
CAS DataBase Reference	98-33-9(CAS DataBase Reference)
FDA UNII	ET833CB2KU
EPA Substance Registry System	Benzenesulfonic acid, 4-amino-3-methyl- (98-33-9)

SAFETY

Risk and Safety Statements

Symbol(GHS)

GHS07

Signal word

Warning

Hazard statements

H315-H319-H335

Precautionary statements

P261-P280a-P304+P340-P305+P351+P338-P405-P501a

Hazard Codes

Risk Statements

45-34

Safety Statements

53-26-36/37/39-45

RIDADR

2811

TSCA

Yes

HazardClass

PackingGroup

III

HS Code

2921420090

NFPA 704

	0
2		0

2-Aminotoluene-5-sulfonic acid price More Price(20)

Manufacturer	Product number	Product description	CAS number	Packaging	Price	Updated	Buy
Sigma-Aldrich	T332895	6-AMINOTOLUENE-3-SULFONIC ACID Aldrich^CPR	98-33-9	1 unit	$185	2025-07-31	Buy
Sigma-Aldrich	T332895	6-AMINOTOLUENE-3-SULFONIC ACID Aldrich	98-33-9	1g	$179	2024-03-01	Buy
TRC	A577170	2-Aminotoluene-5-sulfonicAcid	98-33-9	500mg	$60	2021-12-16	Buy
American Custom Chemicals Corporation	CHM0008383	2-AMINO TOLUENE-5-SULFONIC ACID 95.00%	98-33-9	100G	$2337.65	2021-12-16	Buy
American Custom Chemicals Corporation	CHM0008383	2-AMINO TOLUENE-5-SULFONIC ACID 95.00%	98-33-9	250G	$4097.8	2021-12-16	Buy

Product number	Packaging	Price	Buy
T332895	1 unit	$185	Buy
T332895	1g	$179	Buy
A577170	500mg	$60	Buy
CHM0008383	100G	$2337.65	Buy
CHM0008383	250G	$4097.8	Buy

2-Aminotoluene-5-sulfonic acid Chemical Properties,Uses,Production

Description

2-Aminotoluene-5-sulfonic acid is prepared from o-toluidine and 98 % H2SO4 via the sulfate, which is then baked. The sodium salt can be isolated after liming and precipitation of calcium sulfate. The solution can be used directly in the manufacture of dyes.

Physical properties

White to Pale-yellow to Yellow-brown Sticky Oil to Semi-Solid.

Flammability and Explosibility

Not classified

2-Aminotoluene-5-sulfonic acid Preparation Products And Raw materials

Raw materials

Diphenyl sulfone o-Toluidine 3-Hydroxy-2-naphthoic acid 2-Aminonaphthalene-1-sulfonic acid

Preparation Products

DIRECT ORANGE 118 Acid Brown 2 ACID ORANGE 8 trisodium 4-hydroxy-7-[[[[5-hydroxy-7-sulphonato-6-[(o-tolyl)azo]-2-naphthyl]amino]carbonyl]amino]-3-[(2-methyl-4-sulphonatophenyl)azo]naphthalene-2-sulphonate disodium 7-(benzoylamino)-4-hydroxy-3-[[3-methyl-4-[(2-methyl-4-sulphonatophenyl)azo]phenyl]azo]naphthalene-2-sulphonate

disodium hydrogen bis[4-[[2,6-dihydroxy-3-[(2-hydroxy-3,5-dinitrophenyl)azo]phenyl]azo]-3- methylbenzenesulphonato(3-)]chromate(3-) 2-Hydroxy-5-[(2-methyl-4-sulfophenyl)azo]benzoic acid disodium salt DIRECT RED 24

1of2

2-Aminotoluene-5-sulfonic acid Suppliers

Global( 208)Suppliers

Supplier	Tel	Email	Country	ProdList	Advantage
Hebei Chuanghai Biotechnology Co,.LTD	+86-13131129325	sales1@chuanghaibio.com	China	5251	58
Suzhou Sanyi Polymer Chemical Technology Co., Ltd.	+8615571922873	15571922873@163.com	China	102	58
Shaanxi Franta Biotechnology Co., Ltd	+86-13082019107	admin@flanderff.com	China	244	58
Henan Tianfu Chemical Co.,Ltd.	+86-0371-55170693 +86-19937530512	info@tianfuchem.com	China	21622	55
Hubei Jusheng Technology Co.,Ltd.	18871490254	linda@hubeijusheng.com	CHINA	28172	58
Jinan Finer Chemical Co., Ltd	+86-531-88989536 +86-15508631887	sales@finerchem.com	China	2953	58
Hubei xin bonus chemical co. LTD	86-13657291602	linda@hubeijusheng.com	CHINA	22963	58
Shandong chuangyingchemical Co., Ltd.	18853181302	sale@chuangyingchem.com	CHINA	5906	58
CONIER CHEM AND PHARMA LIMITED	+8618523575427	sales@conier.com	China	49975	58
career henan chemical co	+86-0371-86658258 +8613203830695	factory@coreychem.com	China	29800	58

Supplier	Advantage
Hebei Chuanghai Biotechnology Co,.LTD	58
Suzhou Sanyi Polymer Chemical Technology Co., Ltd.	58
Shaanxi Franta Biotechnology Co., Ltd	58
Henan Tianfu Chemical Co.,Ltd.	55
Hubei Jusheng Technology Co.,Ltd.	58
Jinan Finer Chemical Co., Ltd	58
Hubei xin bonus chemical co. LTD	58
Shandong chuangyingchemical Co., Ltd.	58
CONIER CHEM AND PHARMA LIMITED	58
career henan chemical co	58

View Lastest Price from 2-Aminotoluene-5-sulfonic acid manufacturers

Update time	Product	Price	Min. Order	Purity	Supply Ability	Manufacturer
2025-09-17	2-Aminotoluene-5-sulfonic acid 98-33-9	US $0.00 / KG	1KG	98%min	30tons/month	WUHAN FORTUNA CHEMICAL CO., LTD
2025-08-20	6-Amino-m-toluensulfonic acid 98-33-9	US $20.00 / kg	1kg	99%	10000	Hebei Miaoyin Technology Co.,Ltd
2025-05-26	2-Aminotoluene-5-sulfonic acid 98-33-9	US $30.00-10.00 / kg	10kg	99%	100000kg	Hebei Chuanghai Biotechnology Co,.LTD

2-Aminotoluene-5-sulfonic acid
98-33-9
US $0.00 / KG
98%min
WUHAN FORTUNA CHEMICAL CO., LTD

6-Amino-m-toluensulfonic acid
98-33-9
US $20.00 / kg
99%
Hebei Miaoyin Technology Co.,Ltd

2-Aminotoluene-5-sulfonic acid
98-33-9
US $30.00-10.00 / kg
99%
Hebei Chuanghai Biotechnology Co,.LTD

2-Aminotoluene-5-sulfonic acid Spectrum

2-Aminotoluene-5-sulfonic acid(98-33-9)MS 2-Aminotoluene-5-sulfonic acid(98-33-9)¹HNMR 2-Aminotoluene-5-sulfonic acid(98-33-9)¹³CNMR 2-Aminotoluene-5-sulfonic acid(98-33-9)IR1 2-Aminotoluene-5-sulfonic acid(98-33-9)IR2

98-33-9(2-Aminotoluene-5-sulfonic acid)Related Search:

4-Amino-benzenesulfonic acid monosodium salt p-Toluenesulfonic acid Sodium p-toluenesulfonate Sodium xylenesulfonate Sulfamic acid

4-Amino-3-methylphenol Nickel bis(sulphamidate) SODIUM P-TOLUENESULFONATE Ethyl 2-(Chlorosulfonyl)acetate Sulfanilic acid

2,4-Xylenesulfonic acid 2-AMINO-PYRIMIDINE-5-CARBOXYLIC ACID ETHYL ESTER 6-Aminopyridine-2-carboxylic acid 2-Aminopyrimidine-5-carboxylic acid Indigo Carmine

2-AMINOTOLUENE-5-SULFONIC ACID SODIUM SALT ACID YELLOW 54 ACID ORANGE 8

1of4

2-AMINOTOLUENE-5-SULFONIC ACID 2-TOLUIDINE-5-SULFONIC ACID 4-AMINO-M-TOLUENESULFONIC ACID 4-AMINO-3-METHYLBENZENESULFONIC ACID 6-AMINOTOLUENE-3-SULFONIC ACID OTS 4-amino-3-methyl-benzenesulfonicaci o-Toluidine-4-sulfphonicacid 3-methylsulphanilic acid ORTHO TOLUIDINE META SULFO NIC ACID (OTMSA) 2-AMINOTOLUENE-5-SULFONIC ACID 97% 2-Amino-5-sulfotoluene 2-Methyl-4-sulfoaniline 4-Amino-3-methyl-1-sulfobenzene 3-Methyl-4-aminobenzene-1-sulfonic acid 4-Amino-3-methylbenzene-1-sulfonic acid o-Toluidine-4-sulfonic acid 4-Amino-3-methylbenzenesulphonic acid 2-Amino-5-sulphotoluene, 2-Methyl-4-sulphoaniline Benzenesulfonic acid,4-amino-3-methyl- o-Toluidine-4-sulfonic acid (NH2=1) 2 AMINO TOLUNE 5 SULPHONIC ACID 4-amino-3-methylbenzenesulfonate 2-Aminotoluene-5-sulfonic acid ISO 9001：2015 REACH 2-Aminotoluene-5-suofonic acid 2-Aminotoluene-5-sulfoni 6-Amino-m-toluensulfonic acid TIANFU-CHEM 2-Aminotoluene-5-sulfonic acid 98-33-9 OT5SA (3-METHYLSULPHANILIC ACID) Ortho Toluidine 5 Sulfonic Acid (OTS)/2-Aminotoluene-5-sulfonic acid 2-Methylaniline-4-sulfonamide 98-33-9 C7H9O3SN C7H8NO3S Building Blocks Organic Building Blocks Sulfonic/Sulfinic Acids Sulfur Compounds Intermediates of Dyes and Pigments