4,4'-Diaminostilbene-2,2'-disulfonic acid | CAS No. 81-11-8

Q: What is 4,4'-Diaminostilbene-2,2'-disulfonic acid (CAS: 81-11-8)?

4,4'-Diaminostilbene-2,2'-disulfonic acid (CAS: 81-11-8) is an organic compound with the chemical formula C14H12N2O6S2. It is a white crystalline solid, commonly used as a pH indicator and dye. The compound is known for its strong absorption in the visible spectrum and its ability to change color with pH, making it valuable in analytical chemistry applications.

Q: What are the main uses of 4,4'-Diaminostilbene-2,2'-disulfonic acid (CAS: 81-11-8)?

4,4'-Diaminostilbene-2,2'-disulfonic acid (CAS: 81-11-8) is widely used as a pH indicator, particularly in the range of pH 1.2 to 3.0, where it transitions from red to yellow. It also serves as a dye in textile and industrial applications. Additionally, it is utilized in research for its fluorescent properties and in pharmaceuticals as a component in drug development processes.

Q: Is 4,4'-Diaminostilbene-2,2'-disulfonic acid (CAS: 81-11-8) safe?

4,4'-Diaminostilbene-2,2'-disulfonic acid (CAS: 81-11-8) is generally considered safe when handled properly. It has low toxicity and is not classified as a carcinogen. However, it is advisable to take standard safety precautions, such as wearing gloves and goggles, and to avoid inhalation or skin contact. Safety data sheets should be consulted for detailed handling and disposal guidelines.

Q: How should 4,4'-Diaminostilbene-2,2'-disulfonic acid (CAS: 81-11-8) be stored?

4,4'-Diaminostilbene-2,2'-disulfonic acid (CAS: 81-11-8) should be stored in a cool, dry, and dark place to maintain its stability. It is typically kept in a sealed container away from moisture and light. Storage at temperatures below 25°C is recommended to prevent degradation, and it should be protected from strong oxidizing agents to ensure long-term quality.

4,4'-Diaminostilbene-2,2'-disulfonic acid

Basic Information

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CAS Number

81-11-8

Molecular Formula

C14H14N2O6S2

Molecular Weight

370.4 g/mol

Chemical Classification

Basic Chemical Raw Materials Organic Chemicals Carboxylic Acids

Basic Chemical Raw Materials Organic Chemicals Amines

Fine Chemicals Dyes and Pigments Organic Dyes

Fine Chemicals Surfactants Anionic Surfactants

Basic Physical Properties

Melting Point

>300 °C

Density

1.4732 (rough estimate)

Water Solubility

<0.1 g/100 mL at 23 ºC

Refractive Index

1.6510 (estimate)

SMILES

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C1=CC(=C(C=C1N)S(=O)(=O)O)C=CC2=C(C=C(C=C2)N)S(=O)(=O)O

InChI

InChI=1S/C14H14N2O6S2/c15-11-5-3-9(13(7-11)23(17,18)19)1-2-10-4-6-12(16)8-14(10)24(20,21)22/h1-8H,15-16H2,(H,17,18,19)(H,20,21,22)/b2-1+

InChIKey

REJHVSOVQBJEBF-OWOJBTEDSA-N

LogP

1.5148000000000001

Topological Polar Surface Area

160.77999999999997 Å²

Hydrogen Bond Donor/Acceptor

6 / 8

Complexity

606

Safety Information

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Hazard Statement

H315 Causes skin irritation
Skin corrosion/irritation

H319 Causes serious eye irritation
Serious eye damage/eye irritation

Stability

Stable. Combustible. Incompatible with iron, strong oxidizing agents.

Synonyms & References

English

(E)-4,4'-Diamino-2,2'-stilbendisulfonsaeure
Benzenesulfonic acid, 2,2'-(1,2-ethylenediyl)bis(5-amino-
2,2'-Stilbenedisulfonic acid, 4,4'-diamino-, (E)-
EINECS 201-325-2
Amsonic acid
4,4'-Diamino-2,2'-stilbenedisulfonic acid, (E)-
STK386223
Amsonsaeure
4,4'-Diaminostilbene-2,2'-disulfonic acid
2,2'-(1,2-Ethylenediyl)bis(5-aminobenzenesulfonic acid)
NCGC00164487-02
p,o'-disulfonic acid
NCGC00164487-01
SR-01000944844-1
NSC659761
DTXCID204926
C14H14N2O6S2
BBL000014
A916804
4,4/'-Diamino-2,2/'-stilbenedisulfonic acid, (E)-
899GJ5MP05
Benzenesulfonic acid, 2,2'-[(E)-1,2-ethenediyl]bis[5-amino-
Ethyl7-Boc-5,6,7,8-tetrahydro-1,2,4-triazolo[4,5-a]pyrazine-3-carboxylate
4,4'-Diaminostilbene-2,2'-disulfonic Acid, 95+%
4,4-Diamino-2,2-stilbenedisulfonic acid
CCRIS 4778
2,2'-[(E)-1,2-Ethenediyl]bis[5-aminobenzenesulfonic acid]
SR-01000944844
4-4'-Diamino-2,2'-stilbenedisulphonic acid
HSDB 4239
81-11-8

MDL Number

MFCD00024946

Customs Code

2921420090

FAQ

What is 4,4'-Diaminostilbene-2,2'-disulfonic acid (CAS: 81-11-8)?

4,4'-Diaminostilbene-2,2'-disulfonic acid (CAS: 81-11-8) is an organic compound with the chemical formula C14H12N2O6S2. It is a white crystalline solid, commonly used as a pH indicator and dye. The compound is known for its strong absorption in the visible spectrum and its ability to change color with pH, making it valuable in analytical chemistry applications.

What are the main uses of 4,4'-Diaminostilbene-2,2'-disulfonic acid (CAS: 81-11-8)?

4,4'-Diaminostilbene-2,2'-disulfonic acid (CAS: 81-11-8) is widely used as a pH indicator, particularly in the range of pH 1.2 to 3.0, where it transitions from red to yellow. It also serves as a dye in textile and industrial applications. Additionally, it is utilized in research for its fluorescent properties and in pharmaceuticals as a component in drug development processes.

Is 4,4'-Diaminostilbene-2,2'-disulfonic acid (CAS: 81-11-8) safe?

4,4'-Diaminostilbene-2,2'-disulfonic acid (CAS: 81-11-8) is generally considered safe when handled properly. It has low toxicity and is not classified as a carcinogen. However, it is advisable to take standard safety precautions, such as wearing gloves and goggles, and to avoid inhalation or skin contact. Safety data sheets should be consulted for detailed handling and disposal guidelines.

How should 4,4'-Diaminostilbene-2,2'-disulfonic acid (CAS: 81-11-8) be stored?

4,4'-Diaminostilbene-2,2'-disulfonic acid (CAS: 81-11-8) should be stored in a cool, dry, and dark place to maintain its stability. It is typically kept in a sealed container away from moisture and light. Storage at temperatures below 25°C is recommended to prevent degradation, and it should be protected from strong oxidizing agents to ensure long-term quality.