As4S5

ceramic
· As4S5

As₄S₅ is an arsenic sulfide ceramic compound belonging to the chalcogenide ceramic family, materials composed of elements from groups 16-17 paired with metalloids or metals. This material exists primarily in research and specialized optical applications rather than mainstream industrial use; arsenic sulfide ceramics are investigated for infrared optics, photonic devices, and specialized glass formulations where their unique optical and thermal properties offer advantages over conventional oxides. Engineers would consider As₄S₅ for niche applications requiring high refractive index, infrared transparency, or photosensitive behavior, though toxicity concerns and limited commercial availability make it unsuitable for general-purpose engineering.

infrared optics and lensesphotonic and optical devicesresearch chalcogenide ceramicsspecialized optical coatingslaboratory and experimental applications

Compliance & Regulations

?ITAR?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65
Units:
siimperial
PropertyValueUnitConditionsSource
Bulk Modulus(K)
2,204.6
ksi—
Poisson's Ratio(ν)
0.2700
-—
Shear Modulus(G)
1,299.5
ksi—
Verified Unverified Low confidence (<80%) Link to source
PropertyValueUnitConditionsSource
Density(ρ)
0.1207
lb/in³—
Verified Unverified Low confidence (<80%) Link to source
PropertyValueUnitConditionsSource
Band Gap(Eg)
1.591
eV—
Dielectric Constant (Relative Permittivity)(εr)
5.450
-—
Electronic Dielectric Tensor(ε∞)
Matrix (redacted)
-—
Total Dielectric Tensor(ε)
Matrix (redacted)
-—
Magnetic Moment(μB)
0.000
µB—
Seebeck Coefficient(S)
-223.5
µV/K—
Verified Unverified Low confidence (<80%) Link to source
PropertyValueUnitConditionsSource
Energy Above Hull(ΔEhull)
0.000
eV/atom—
Formation Energy(ΔHf)
-0.1531
eV/atom—
Verified Unverified Low confidence (<80%) Link to source

Regulatory Screening

Environmental

Export Control

Quality & Standards

RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.