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

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Origin: China

Cas No: 81-11-8

Specification: 99%min

Min order Quantity: 1 /kg

Supply Ability: 50 mt/month

Lead time: 7 days for OEM, 3 days for ready goods

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Product Description

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CAS No.: 81-11-8 Formula: C14H14N2O6S2 Molecular Weight: 370.40100

Description

4,4′-Diamino-2,2′-stilbenedisulfonic acid is the organic compound with the formula (H2NC6H3SO3H)2C2H2. It is a white, water-soluble solid. Structurally, it is a derivative of trans-stilbene, containing amino and sulfonic acid functional groups on each of the two phenyl rings. The compound is a popular optical brightener for use in laundry detergents. It is produced by reduction of 4,4′-dinitro-2,2′-stilbenedisulfonic acid with iron powder.

Basic Info

Chemical Name	4,4'-Diamino-2,2'-stilbenedisulfonic acid
Synonyms	4,4'-diamino-stilbene-2,2'-disulfonic acid; tinopalbhs; DSD ACID; 4,4‘-Diamino-2,2‘-stilbenedisulfonic acid; DASDA; 4,4'-diaminostilbene-2,2'-disulphonic acid; DASD; AMSONIC ACID; flavonicacid; 2,2'-(1,2-ethenediyl)bis(5-amino)benzenesulfonic acid; AMSOMICACID; DAS;
CAS No.	81-11-8
Molecular Formula	C14H14N2O6S2
Molecular Weight	370.40100
PSA	177.54000
LogP	4.83880

Properties

Appearance & Physical State	White to Yellowish Crystalline Powder
Density	1.662 g/cm3
Melting Point	>325ºC
Refractive Index	1.726
Stability	Stable. Combustible. Incompatible with iron, strong oxidizing agents.
Storage Condition	-20ºC Freezer

Safety Info

RTECS	WJ6603000
Safety Statements	S22-S26-S36/37/39-S45
HS Code	2921420090
RIDADR	UN 2583
Risk Statements	R34
Hazard Codes	C

Synthesis Route

4,4'-dinitrostilbene-2,2'-disulphonic acid→4,4'-Diamino-2,2'-stilbenedisulfonic acid
4-nitrotoluene-2-sulfonic acid→4,4'-Diamino-2,2'-stilbenedisulfonic acid
4-nitrotoluene-2-sulfonic acid→5-Amino-2-methylbenzenesulfonic acid+4,4'-Diamino-2,2'-stilbenedisulfonic acid

Toxicity

Exposure Route	Type of Test	Species Observed	Dose/Duration	Toxic Effects
Oral	LD50 - Lethal dose, 50 percent kill	Rodent - guinea pig	47 gm/kg	1.Liver-liver function tests impaired 2.Kidney, Ureter, Bladder-renal function tests depressed
Intraperitoneal	TDLo - Lowest published toxic dose	Rodent - rat	300 mg/kg,female 1 day(s) pre-mating	1.Reproductive-Maternal Effects-uterus, cervix, vagina

Precursor

4-nitrotoluene-2-sulfonic acid
4-Nitro-4'-aminostilbene-2,2'-disulfonic acid
Hydrazine hydrate
4,4'-dinitrostilbene-2,2'-disulphonic acid

Downstream Product

4,4'-Dihydrazinostilbene-2,2'-disulphonic acid
5-[(4-aminophenyl)sulfonylamino]-2-[2-[4-[(4-aminophenyl)sulfonylamino]-2-sulfophenyl]ethenyl]benzenesulfonic acid
5-amino-2-[2-(4-amino-2-sulfophenyl)ethyl]benzenesulfonic acid

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