Molecular formula
As2S3

SMILES
S1[As]2S[As]1S2

Safety labels

Fragrance
Odorless	38.71%
Meaty	24.49%
Fishy	23.37%
Mushroom	19.35%
Cooked	19.08%
Sulfurous	17.34%
Roasted	16.51%
Nutty	13.72%
Pungent	12.84%
Animal	12.57%

 

pKa est.
-3.94 (strong acid)

Molecular weight
246.0 g/mol

Melting point expt.

• 572 °F (USCG, 1999)
• 310 °C

Boiling point

• 707 °C

Flash point

• 186.72 ˚C est.

Solubility expt.

• Sol in alkalies, carbonates, alkali sulfides; slowly sol in hot HCl
• Sol in alcohol; slightly sol in hot water
• 0.00005 g/100 ml water at 18 °C

• ARSENIC TRISULFIDE
• Arsenic trisulphide
• Diarsenic trisulfide
• Arsenic sesquisulfide
• Diarsenic trisulphide
• Arsenic sesquisulphide
• Yellow arsenic sulfide
• Arsenic(III) sulphide
• Sekio
• Shio
• Arsenic Yellow
• Arsenic sulphide
• Arsenous sulfide
• Arsenic Red
• Arsenious sulfide
• Arsenic tersulfide
• Arsenious sulphide
• King's Gold
• Arsenic tersulphide
• 44SIJ800OX
• Arsenic Sulfide Yellow
• Arsenic sulphides, natural
• UNII-44SIJ800OX
• CI 77086
• YELLOW ARSENIC SULPHIDE
• HSDB 428
• C.I. 77086
• Arsenic sulfide (As0.4S0.6)
• DTXSID50274153
• ARSENIC SULPHIDE (AS2S3)
• ARSENICUM SULPHURATUM FLAVUM
• EINECS 215-117-4
• Arsenic sulfide (As2S3), (yellow)
• AI3-01006
• NATURAL ORPIMENT
• ARSENOUS SULPHIDE
• Pesticide Code: 006901
• ARSENIC TRISULFIDE [MI]
• ARSENIC TRISULFIDE [HSDB]
• DTXCID80196556
• UKUVVAMSXXBMRX-UHFFFAOYSA-N
• ARSENIC SULFIDE (ASS1.5)
• ARSENIC TRISULFIDE (AS2S3)
• ARSENIC TRISULFIDE [WHO-DD]
• NA1557
• ARSENIC SESQUISULFIDE (AS2S3)
• Arsenic sulfide [NA1557] [Poison]
• Arsenic trisulfide [NA1557] [Poison]
• ARSENICUM SULPHURATUM FLAVUM [HPUS]
• Q425065

Arsenic trisulfide is primarily used as a precursor for chalcogenide and infrared-transmitting glasses, enabling infrared optics and fiber applications. It is also used in thin-film coatings and optical films to improve infrared transmission and performance in photonic devices. Historically, the compound served as a yellow-orange pigment (orpiment) in paints and ceramics and may appear in vintage ceramic coloration. Additionally, it can act as a precursor or additive for chalcogenide glass systems and other photonic materials when processed under controlled conditions. Use is subject to regulatory and safety considerations due to toxicity.

gpt-5-nano

Solvent	Solubility (g/L)
ethanol	75.47
methanol	83.68
isopropanol	73.85
water	5.39
ethyl acetate	99.3
n-propanol	68.27
acetone	154.69
n-butanol	72.82
acetonitrile	58.59
DMF	396.55
toluene	79.52
isobutanol	57.34
1,4-dioxane	203.47
methyl acetate	99.24
THF	355.93
2-butanone	113.65
n-pentanol	60.01
sec-butanol	63.61
n-hexane	15.6
ethylene glycol	56.04
NMP	374.45
cyclohexane	27.01
DMSO	410.61
n-butyl acetate	91.37
n-octanol	68.74
chloroform	264.74
n-propyl acetate	76.61
acetic acid	106.84
dichloromethane	206.58
cyclohexanone	192.53
propylene glycol	56.82
isopropyl acetate	87.97
DMAc	260.3
2-ethoxyethanol	107.49
isopentanol	63.89
n-heptane	23.68
ethyl formate	91.2
1,2-dichloroethane	144.44
n-hexanol	75.57
2-methoxyethanol	179.0
isobutyl acetate	62.91
tetrachloromethane	76.21
n-pentyl acetate	103.25
transcutol	186.46
n-heptanol	71.05
ethylbenzene	45.02
MIBK	93.69
2-propoxyethanol	147.04
tert-butanol	90.28
MTBE	78.21
2-butoxyethanol	120.07
propionic acid	82.47
o-xylene	65.42
formic acid	64.65
diethyl ether	90.37
m-xylene	67.98
p-xylene	55.65
chlorobenzene	114.17
dimethyl carbonate	107.92
n-octane	16.4
formamide	94.89
cyclopentanone	283.44
2-pentanone	119.12
anisole	98.68
cyclopentyl methyl ether	165.86
gamma-butyrolactone	278.52
1-methoxy-2-propanol	165.62
pyridine	169.97
3-pentanone	99.1
furfural	294.36
n-dodecane	15.32
diethylene glycol	141.21
diisopropyl ether	51.72
tert-amyl alcohol	73.29
acetylacetone	166.68
n-hexadecane	17.33
acetophenone	109.52
methyl propionate	110.43
isopentyl acetate	84.56
trichloroethylene	260.53
n-nonanol	66.27
cyclohexanol	91.59
benzyl alcohol	91.18
2-ethylhexanol	58.83
isooctanol	61.98
dipropyl ether	79.81
1,2-dichlorobenzene	127.4
ethyl lactate	68.16
propylene carbonate	169.17
n-methylformamide	139.04
2-pentanol	65.95
n-pentane	21.75
1-propoxy-2-propanol	119.28
1-methoxy-2-propyl acetate	124.62
2-(2-methoxypropoxy) propanol	100.97
mesitylene	55.88
ε-caprolactone	159.7
p-cymene	48.67
epichlorohydrin	242.76
1,1,1-trichloroethane	156.33
2-aminoethanol	68.2
morpholine-4-carbaldehyde	302.79
sulfolane	402.25
2,2,4-trimethylpentane	15.44
2-methyltetrahydrofuran	190.38
n-hexyl acetate	108.72
isooctane	14.93
2-(2-butoxyethoxy)ethanol	132.86
sec-butyl acetate	61.68
tert-butyl acetate	103.87
decalin	17.26
glycerin	100.96
diglyme	220.89
acrylic acid	96.77
isopropyl myristate	65.9
n-butyric acid	99.67
acetyl acetate	91.84
di(2-ethylhexyl) phthalate	68.81
ethyl propionate	77.06
nitromethane	162.61
1,2-diethoxyethane	101.81
benzonitrile	105.13
trioctyl phosphate	61.04
1-bromopropane	85.84
gamma-valerolactone	305.56
n-decanol	55.75
triethyl phosphate	60.28
4-methyl-2-pentanol	53.56
propionitrile	60.79
vinylene carbonate	163.41
1,1,2-trichlorotrifluoroethane	219.97
DMS	101.94
cumene	38.65
2-octanol	64.01
2-hexanone	84.16
octyl acetate	81.07
limonene	62.53
1,2-dimethoxyethane	166.25
ethyl orthosilicate	58.62
tributyl phosphate	60.14
diacetone alcohol	127.36
N,N-dimethylaniline	88.95
acrylonitrile	82.59
aniline	104.01
1,3-propanediol	88.53
bromobenzene	118.78
dibromomethane	156.9
1,1,2,2-tetrachloroethane	234.56
2-methyl-cyclohexyl acetate	79.85
tetrabutyl urea	82.51
diisobutyl methanol	51.25
2-phenylethanol	97.61
styrene	55.24
dioctyl adipate	84.64
dimethyl sulfate	204.74
ethyl butyrate	77.93
methyl lactate	106.36
butyl lactate	88.9
diethyl carbonate	60.52
propanediol butyl ether	109.86
triethyl orthoformate	71.57
p-tert-butyltoluene	52.74
methyl 4-tert-butylbenzoate	131.87
morpholine	191.66
tert-butylamine	62.86
n-dodecanol	47.54
dimethoxymethane	242.64
ethylene carbonate	128.31
cyrene	147.44
2-ethoxyethyl acetate	125.98
2-ethylhexyl acetate	77.4
1,2,4-trichlorobenzene	151.28
4-methylpyridine	154.89
dibutyl ether	65.58
2,6-dimethyl-4-heptanol	51.25
DEF	150.35
dimethyl isosorbide	194.17
tetrachloroethylene	169.71
eugenol	131.84
triacetin	118.53
span 80	114.27
1,4-butanediol	52.1
1,1-dichloroethane	127.65
2-methyl-1-pentanol	55.96
methyl formate	137.58
2-methyl-1-butanol	58.62
n-decane	21.54
butyronitrile	69.36
3,7-dimethyl-1-octanol	59.93
1-chlorooctane	54.64
1-chlorotetradecane	32.1
n-nonane	19.96
undecane	17.75
tert-butylcyclohexane	17.57
cyclooctane	16.17
cyclopentanol	117.52
tetrahydropyran	151.72
tert-amyl methyl ether	76.78
2,5,8-trioxanonane	176.75
1-hexene	35.47
2-isopropoxyethanol	89.42
2,2,2-trifluoroethanol	77.61
methyl butyrate	90.14

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