Pigment Yellow 53

Basic Information

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CAS Number

1303-33-9

Molecular Formula

As4S6

Molecular Weight

492.08 g/mol

EINECS

215-117-4

Chemical Classification

Basic Chemical Raw Materials Organic Chemicals Heterocyclic Compounds

Pharmaceutical Chemicals Pharmaceutical Intermediates Heterocyclic Intermediates

Laboratory Chemicals Research Chemicals Biochemical Reagents

Basic Physical Properties

Melting Point

300 °C

Boiling Point

707 °C

Density

3.43 g/mL at 25 °C

Water Solubility

Insoluble in water. Soluble in alkali sulfides or carbonate, hot HCl

Flash Point

707°C

Refractive Index

2.81

SMILES

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S1[As]2S[As]3S[As]1S[As](S2)S3

InChI

InChI=1S/As4S6/c5-1-6-3-8-2(5)9-4(7-1)10-3

InChIKey

OUFDYFBZNDIAPD-UHFFFAOYSA-N

LogP

2.3659999999999997

Topological Polar Surface Area

0.0 Å²

Hydrogen Bond Donor/Acceptor

0 / 0

Complexity

84.8

Safety Information

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Hazard Statement

H301 Toxic if swallowed
Acute toxicity, oral

H311 Toxic in contact with skin
Acute toxicity, dermal

H331 Toxic if inhaled
Acute toxicity, inhalation

Hazard Class

Class 6.1 Class 6.1

Sensitiveness

moisture sensitive

Toxicity

mouse,LD50,intraperitoneal,215mg/kg (215mg/kg),LUNGS, THORAX, OR RESPIRATION: DYSPNEABEHAVIORAL: MUSCLE WEAKNESSGASTROINTESTINAL: "HYPERMOTILITY, DIARRHEA",Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. Vol. 28(7), Pg. 53, 1984.

Synonyms & References

English

king’sgold
naturalorpiment
pigmentyellow39
shio
yellowarsenicsulfide
ARSENIC TRISULFIDE
ARSENIC TRI SULPHIDE
ARSENIC SULFIDE YELLOW
Arsenic sulfide (As2S3)
Arsenic(III) sulfide
Arsenictrisulfide
Arsenic yellow
Arsenious sulfide
Arsenous sulfide
Auripigment
Auripigmentum
C.I. 77086
C.I. Pigment Yellow 39
Diarsenic trisulfide
Pigment Yellow 39
Sekio
Shio
ci77086
orpiment
ai3-01006
arsenicred
AURYPIGMENT
c.i.77086
arsenicyellow

MDL Number

MFCD00003435

EC Number

215-117-4

Customs Code

2813909000

FAQ

What are the physical and chemical properties of Pigment Yellow 53 (CAS: 1303-33-9)?

Pigment Yellow 53 (CAS: 1303-33-9) is a yellow pigment with a crystalline form. Its molecular weight is approximately 821.7 g/mol. It is insoluble in water but soluble in organic solvents. Its chemical structure is based on a dibenzalacetone chromophore. This pigment is stable under normal conditions but may react with strong oxidizing agents. It has a high lightfastness and is resistant to weathering and fading.

How is Pigment Yellow 53 (CAS: 1303-33-9) typically synthesized?

Pigment Yellow 53 (CAS: 1303-33-9) is synthesized through the condensation of benzaldehyde and acetophenone in the presence of a Lewis acid catalyst such as aluminum chloride. The reaction yields a dibenzalacetone derivative, which is then converted into the final pigment through a series of chemical modifications. The overall process provides good yield and high selectivity.

What industries use Pigment Yellow 53 (CAS: 1303-33-9)?

Pigment Yellow 53 (CAS: 1303-33-9) is widely used in the printing ink, paint and coating, plastic, and textile industries. It is also applicable in the pharmaceuticals and food industries for coloring applications. Its high lightfastness and weather resistance make it particularly suitable for outdoor applications.

What precautions should be taken when handling Pigment Yellow 53 (CAS: 1303-33-9)?

When handling Pigment Yellow 53 (CAS: 1303-33-9), ensure proper personal protective equipment (PPE) is used, including gloves, goggles, and lab coat. Store the pigment in a cool, dry place away from direct sunlight and heat sources. In case of spill, use appropriate absorbents and follow the safety data sheet (SDS) for disposal. Always work in a well-ventilated area or fume hood to avoid inhalation of dust or fumes.