4,4'-Diamino-2,2'-stilbenedisulfonic acid

4,4'-Diamino-2,2'-stilbenedisulfonic acid Properties

Melting point	300 °C
Density	1.4732 (rough estimate)
vapor pressure	1.3hPa at 25℃
refractive index	1.6510 (estimate)
storage temp.	Keep in dark place,Inert atmosphere,Room temperature
solubility	Aqueous Base (Slightly)
pka	-1.58±0.50(Predicted)
form	Crystalline Powder
color	Cream to yellow-brown
Water Solubility	<0.1 g/100 mL at 23 ºC
Merck	14,595
BRN	629516
Stability	Stable. Combustible. Incompatible with iron, strong oxidizing agents.
LogP	-1.7--1.42 at 25℃
CAS DataBase Reference	81-11-8(CAS DataBase Reference)
FDA UNII	899GJ5MP05
EPA Substance Registry System	Amsonic acid (81-11-8)
UNSPSC Code	12352100
NACRES	NA.22

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-P264-P280-P302+P352+P332+P313+P362+P364-P305+P351+P338+P337+P313

Hazard Codes

C,Xn

Risk Statements

34-22-36/37/38-20/21/22

Safety Statements

24/25-45-36/37/39-26-22

RIDADR

UN 2583

RTECS

WJ6603000

TSCA

Yes

HS Code

29215900

Hazardous Substances Data

81-11-8(Hazardous Substances Data)

NFPA 704

	1
2		0

4,4'-Diamino-2,2'-stilbenedisulfonic acid price More Price(27)

Manufacturer	Product number	Product description	CAS number	Packaging	Price	Updated	Buy
Sigma-Aldrich	462268	4,4′-Diamino-2,2′-stilbenedisulfonic acid technical grade, 85%	81-11-8	100G	$111	2024-03-01	Buy
TCI Chemical	D0121	4,4'-Diaminostilbene-2,2'-disulfonic Acid >94.0%(T)	81-11-8	25g	$39	2024-03-01	Buy
TCI Chemical	D0121	4,4'-Diaminostilbene-2,2'-disulfonic Acid >94.0%(T)	81-11-8	100g	$78	2024-03-01	Buy
Alfa Aesar	A16664	4,4'-Diaminostilbene-2,2'-disulfonic acid, 95%	81-11-8	25g	$32.65	2024-03-01	Buy
Alfa Aesar	A16664	4,4'-Diaminostilbene-2,2'-disulfonic acid, 95%	81-11-8	100g	$109.65	2024-03-01	Buy

Product number	Packaging	Price	Buy
462268	100G	$111	Buy
D0121	25g	$39	Buy
D0121	100g	$78	Buy
A16664	25g	$32.65	Buy
A16664	100g	$109.65	Buy

4,4'-Diamino-2,2'-stilbenedisulfonic acid Chemical Properties,Uses,Production

Chemical Properties

Light Yellow Powder

Uses

4,4’-Diaminostilbene-2,2’-disulfonic Acid, 95+% (cas# 81-11-8) is a compound useful in organic synthesis.

Uses

In manufacture of dyes, bleaching agents.

General Description

Odorless yellowish microscopic needles or cream-colored powder. pH approximately 4.3 at 30 g/L water (suspension).

Air & Water Reactions

Insoluble in water.

Reactivity Profile

4,4'-Diamino-2,2'-stilbenedisulfonic acid is incompatible with iron. 4,4'-Diamino-2,2'-stilbenedisulfonic acid forms sparingly water-soluble, crystalline salts with many bisquaternary ammonium bases.

Fire Hazard

Flash point data for 4,4'-Diamino-2,2'-stilbenedisulfonic acid are not available; however, 4,4'-Diamino-2,2'-stilbenedisulfonic acid is probably combustible.

Synthesis

A typical procedure for preparation of 4,4'-Diamino-2,2'-stilbenedisulfonic acid: A solution of potassium hydroxide (3 g, 52 mmol) in a low amount of water was slowly added with stirring to a mixture of p-nitrotoluene ortho sulfonic acid (2.2 g, 10 mmol), diethylene glycol (20 mL) and 2.5 mL of hydrazine hydrate 85%. The resulting mixture was refluxed for 30 minutes, then the condenser was removed, the aqueous liquor evaporated, and refluxing continued for 2.5 hours. The reaction mixture was cooled and diluted with water when the reaction was completed. Then, the cooled and diluted reaction mixture was acidified with warm, concentrated hydrochloric acid, and the pure product was filtered.

Environmental Fate

For the environment, various NOEC and LC50 values were gained from test results; LC50 = > 1000 mg/l (acute fish); EC50 = 210 mg/l (acute daphnia); EC50 = 76 mg/l (acute algae); NOEC = 32 mg/l (algae); NOEC = 37 mg/l (longterm daphnia reproduction). The lowest toxicity result (72h-NOEC, biomass, for Selenastrum capricornutum, 32 mg/l) was used to derive a PNEC. An assessment factor of 100 was used according to the OECD Provisional Guidance for Initial Assessment of Aquatic Effects. Thus, PNEC of 4,4'-Diamino-2,2'-stilbenedisulfonic acid is 0.32 mg/l in the present report. The PEC is lower than the PNEC. The environmental risk is presumed to be low.

4,4'-Diamino-2,2'-stilbenedisulfonic acid synthesis

Synthesis of 4,4'-Diamino-2,2'-stilbenedisulfonic acid from 4-Nitrotoluene-2-sulfonic Acid

4,4'-Diamino-2,2'-stilbenedisulfonic acid Preparation Products And Raw materials

Raw materials

4-Nitrotoluene

Preparation Products

fluorescent whitening agent PRS fluorescent whitening agent JD-3 Fluorescent Brightener BC Direct Red Brown RN fluorescent whitening agent SBA

Direct Red 227 Fluorescent Brightener VBU Reactive Yellow KE-4RN Fluorescent brightener No.31 fluorescent bleaches R

fluorescent whitening agent RA Direct Blending Brilliant Red D-5BL Direct Yellow 12 Reactive Yellow 179 fluorescent whitening agent DMS

Reactive Red KD-8B Reactive Orange KE-2G Fluorescent brightener 85 fluorescent bleaches BR Direct Blending Yellow D-3RNL

FLUORESCENT BRIGHTENER 28 Reactive Yellow 84 Reactive Yellow KE-RN PROCION YELLOW H-E3G

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4,4'-Diamino-2,2'-stilbenedisulfonic acid Suppliers

Global( 348)Suppliers

Supplier	Tel	Email	Country	ProdList	Advantage
Shanghai Xin Cheng Yue Chemical Co.,Ltd	+86-021-57806787 +86-17701820076	wuziwei@xinyuefirm.com	China	31	58
Anhui Royal Chemical Co., Ltd.	+86-025-86655873 +8613962173137	marketing@royal-chem.com	China	192	55
Hebei Chuanghai Biotechnology Co., Ltd	+8615531157085	abby@chuanghaibio.com	China	8808	58
Hebei Mujin Biotechnology Co.,Ltd	+86 13288715578 +8613288715578	sales@hbmojin.com	China	12806	58
Hebei Yanxi Chemical Co., Ltd.	+8617531153977	allison@yan-xi.com	China	5854	58
Hebei Chuanghai Biotechnology Co., Ltd	+8615531151365	mina@chuanghaibio.com	China	18137	58
Capot Chemical Co.,Ltd.	+86-（0）57185586718 +86-13336195806	sales@capot.com	China	29730	60
Shanghai Daken Advanced Materials Co.,Ltd	+86-371-+86-371-66670886	info@dakenam.com	China	19843	58
Dalian Richfortune Chemicals Co., Ltd	0411-84820922 8613904096939	sales@richfortunechem.com	China	304	57
Henan Tianfu Chemical Co.,Ltd.	+86-0371-55170693 +86-19937530512	info@tianfuchem.com	China	21628	55

Supplier	Advantage
Shanghai Xin Cheng Yue Chemical Co.,Ltd	58
Anhui Royal Chemical Co., Ltd.	55
Hebei Chuanghai Biotechnology Co., Ltd	58
Hebei Mujin Biotechnology Co.,Ltd	58
Hebei Yanxi Chemical Co., Ltd.	58
Hebei Chuanghai Biotechnology Co., Ltd	58
Capot Chemical Co.,Ltd.	60
Shanghai Daken Advanced Materials Co.,Ltd	58
Dalian Richfortune Chemicals Co., Ltd	57
Henan Tianfu Chemical Co.,Ltd.	55

View Lastest Price from 4,4'-Diamino-2,2'-stilbenedisulfonic acid manufacturers

Update time	Product	Price	Min. Order	Purity	Supply Ability	Manufacturer
2025-04-28	4,4'-Diamino-2,2'-stilbenedisulfonic acid 81-11-8	US $0.00-0.00 / kg	1000kg	78	1000ton	Shanghai Xin Cheng Yue Chemical Co.,Ltd
2025-04-28	DSD Acid 81-11-8	US $100.00-1900.00 / kg	1000kg	95%	20 tons	Anhui Royal Chemical Co., Ltd.
2025-04-23	4,4'-Diamino-2,2'-stilbenedisulfonic acid 81-11-8	US $10.00 / KG	1KG	99%	10 mt	Hebei Chuanghai Biotechnology Co., Ltd

4,4'-Diamino-2,2'-stilbenedisulfonic acid
81-11-8
US $0.00-0.00 / kg
78
Shanghai Xin Cheng Yue Chemical Co.,Ltd

DSD Acid
81-11-8
US $100.00-1900.00 / kg
95%
Anhui Royal Chemical Co., Ltd.

4,4'-Diamino-2,2'-stilbenedisulfonic acid
81-11-8
US $10.00 / KG
99%
Hebei Chuanghai Biotechnology Co., Ltd

4,4'-Diamino-2,2'-stilbenedisulfonic acid Spectrum

4,4'-Diamino-2,2'-stilbenedisulfonic acid(81-11-8)MS 4,4'-Diamino-2,2'-stilbenedisulfonic acid(81-11-8)IR1 4,4'-Diamino-2,2'-stilbenedisulfonic acid(81-11-8)IR2

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4,4'-DINITROSTILBENE-2,2'-DISULFONIC ACID DISODIUM SALT Fluorescent Brightener 28 4,4'-BIS(4-AMINO-1-NAPHTHYLAZO)-2,2'-STILBENEDISULFONIC ACID

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diaminostilbenedisulfonicacid 4,4'-Diaminodiphenylethylene-2,2'-disulfonic acid 4',4" Diamino stillbene 2'2" disulphonic acid 1,2-bis(4-amino-2-sulfophenyl)ethene 4,4'-Diamino-2,2'-stibenedisulfonic acid 4,4'-DIAMINO-2,2'-STILBENEDISULFONIC ACI D, TECH., 85% 2,2’-(1,2-ethenediyl)bis[5-amino-benzenesulfonicaci 2,2’-(1,2-ethenediyl)bis[5-amino-Benzenesulfonicacid 2,2’-(1,2-ethenediyl)bis[5-amino-benzenesulfonicacid] 2,2’-(1,2-ethylenediyl)bis(5-amino-benzenesulfonicaci 2,2’-disulfo-4,4’-stilbenediamine 4,4’-diamino-2’-stilbenedisulfonicacid 4,4’-Diaminostibene-2,2’-disulfonicacid Benzenesulfonic acid,2,2'-(1,2-ethenediyl)bis[5-aMino- flavonicacid nci-c60162 p,p’-diaminodiphenylethylene-o,o’-disulfonicacid p,p’-diaminostilbene-o,o’-disulfonicacid tinopalbhs 4,4'-Diaminostilbene-2,2'-disulphonicacid(Amsonicacid) 4,4'-Diamino-2,2'-st 44DIAMINO22STILBENEDISULPHONICACID 22DIAMINO44STILBENEDISULFONICACID AMSOMICACID 4,4'-Diaminostilben-2,2'-disulfonsure Diaminostilbene-2,2'-disulfonic acid AKOS BBS-00004717 4,4 DIAMINO STILBENE 2:2 DISULFONIC ACID 4,4'-DIAMINO STIBEN-2,2'-DISULFONIC ACID 4,4'-DIAMINOSTILBENE-2,2-DISULPHONIC ACID 4,4'-DIAMINO-2,2'-STILBENEDISULFONIC ACID 2,2'-(1,2-ethylenediyl)bis(5-aminobenzenesulfonic acid) DASD 2,2’-(1,2-ethenediyl)bis(5-amino-benzenesulfonicaci 4,4'-Diamino-2,2'-stiL benedisuL 4,4'-Diaminostilbene-2,2'-disulfonic Acid > 4,4'-Diamino-2,2'-stilbenedisulfonicaci 4,4'-Diamino-2,2'-stilbenedisulfonic acid ISO 9001：2015 REACH AMSONIC ACID DSD ACID DAS DASDA 4,4'-Diaminostilbene-2,2'-disulfonic Acid 6,6'-(Ethene-1,2-diyl)bis(3-aminobenzenesulfonic acid) 4,4'-diaminostilbene-2,2'-disulphonic acid 4,4’-Diaminostilbene-2,2’-disulfonic Acid, 95+% 81-11-8 93981-21-2 1981-11-08 1981-11-8 C14H14N2O8S2 C15H14N2O6S2 C14H14S2N2O6 H2NC6H3SO3HCH2 C14H14N2O6S2 Stilbenes Organic Building Blocks