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7704-34-9

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Basic Information
CAS No.: 7704-34-9
Name: Sulfur
Article Data: 2983
Molecular Structure:
Molecular Structure of 7704-34-9 (Sulfur)
Formula: S
Molecular Weight: 33.0739
Synonyms: Sultaf;Brimstone;Sulfur, solid;sulfur donor;Sublimed sulfur;Super cosan;Kolloidschwefel 95;Sulfidal;Sulfur, rhombic;Ground vocle sulfur;Sulfex;Cosan 80;Sulfur atom;Netzschwefel;Sulforon;Sulfur ointment;Kolofog;Shreesul;Agri-Sul;Thiovit;Sulfur, sublimed;Dispersul;Precipitated sulfur;Ultra Sulfur;Sufran;Sulfur, pharmaceutical;Magnetic 6;Flour sulfur;Spersul thiovit;Kumulus;Gofrativ;Micowetsulf;Kumulus FL;Sulkol;Bensulfoid;Sulsol;Colloidal-S;Sulfur (JP14);Molten Sulfur;Sulfur,Sublimed;sulphur;
EINECS: 231-722-6
Density: 2.36 g/cm3
Melting Point: 114 °C
Boiling Point: 445 °C
Flash Point: 168 °C
Solubility: insoluble in water
Appearance: Yellow powder.
Hazard Symbols: FlammableF
Risk Codes: 11
Safety: 16-26
PSA: 202.40000
LogP: 5.18560
Synthetic route
7446-09-5

sulfur dioxide

A

7664-93-9

sulfuric acid

B

7704-34-9

sulfur

Conditions
ConditionsYield
at 170-180°C; in very dilute soln. complete decompn. in 2 h, incomplete decompn. in concd. solns.;A n/a
B 100%
byproducts: H2S4O6;
sodium thiosulfate In water 100°C;
201230-82-2

carbon monoxide

7446-09-5

sulfur dioxide

7704-34-9

sulfur

Conditions
ConditionsYield
With catalyst: CeO2.Co3O4 284-465°C, metal oxide mixture catalysts activity: CuCo2O4;100%
With catalyst: CuCo2O4 284-465°C, metal oxide mixture catalysts activity: CuCo2O4;100%
With catalyst: LaCoO3 284-465°C, metal oxide mixture catalysts activity: CuCo2O4;100%

vanadium sulfate

A

1333-74-0

hydrogen

B

7704-34-9

sulfur

Conditions
ConditionsYield
1690°C complete decompn.;A 100%
B n/a
red heat;A 7%
B n/a
400°C;

barium dithionate

A

barium sulfate

B

7704-34-9

sulfur

Conditions
ConditionsYield
With water In water byproducts: H2SO4; 6-8 h at 150-180°C;A 100%
B n/a
With H2O In water byproducts: H2SO4; 6-8 h at 150-180°C;A 100%
B n/a
With water In water byproducts: H2SO4, SO2; incomplete decompn.;
With H2O In water byproducts: H2SO4, SO2; incomplete decompn.;

tungsten(IV) sulfide

A

7704-34-9

sulfur

B

7440-33-7

tungsten

Conditions
ConditionsYield
2000°C, fast react.;A n/a
B 100%
2000°C, fast react.;A n/a
B 100%
1200°C, 2 h;A n/a
B 60%
1200°C, 2 h;A n/a
B 60%

cadmium(II) dithionate

A

cadmium sulfate

B

7704-34-9

sulfur

Conditions
ConditionsYield
With water byproducts: H2SO4; 150-180°C under N2;A 100%
B n/a
With H2O byproducts: H2SO4; 150-180°C under N2;A 100%
B n/a

ammonium thiosulfate

7783-06-4

hydrogen sulfide

A

7732-18-5

water

B

7704-34-9

sulfur

Conditions
ConditionsYield
In water Kinetics; Reduction of (NH4)2S2O3 (c=0.4 mole/liter) by H2S in aq. soln. (50°C, pH=5, p(H2S)=0.08 MPa) in presence of Si-based catalyst.; Gravimetrical determination of S.;A n/a
B 99.7%
In water Kinetics; Reduction of (NH4)2S2O3 (c=1.0 mole/liter) by H2S in aq. soln. (50°C, pH=5, p(H2S)=0.08 MPa) in presence of Si-based catalyst.; Gravimetrical determination of S.;A n/a
B 99.87%
In water Kinetics; Reduction of (NH4)2S2O3 (c=1.0 mole/liter) by H2S in aq. soln. (50°C, pH=5, p(H2S)=0.08 MPa).; Gravimetrical determination of S.;A n/a
B 76.1%
In water Kinetics; Reduction of (NH4)2S2O3 (c=0.4 mole/liter) by H2S in aq. soln. (50°C, pH=5, p(H2S)=0.08 MPa).; Gravimetrical determination of S.;A n/a
B 71.5%
7783-06-4

hydrogen sulfide

7446-09-5

sulfur dioxide

A

7732-18-5

water

B

7704-34-9

sulfur

Conditions
ConditionsYield
In hydrogenchloride 20°C;satd. solns.; molar ratio 2 : 1; 15 % HCl soln., ,30 min;; S coagulated by addn. of gelatine or Al2(SO4)3;A n/a
B 99.7%
In hydrogenchloride 20°C;satd. solns.; molar ratio 2 : 1; 15 % HCl soln., ,30 min;; S coagulated by addn. of gelatine or Al2(SO4)3;A n/a
B 99.7%
In hydrogenchloride 20°C; satd. solns.; molar ratio 2 : 1; 3.5 % HCl soln.;; S coagulated by addn. of gelatine or Al2(SO4)3;;A n/a
B 93.5%
7446-09-5

sulfur dioxide

A

7664-93-9

sulfuric acid

B

7704-34-9

sulfur

Conditions
ConditionsYield
In not given Electrolysis; Pt anode, graphite cathode, area of the electrodes 30 cm^2, 1 A, 20 min, 0.208 mg/l SO2 soln.;A 98.16%
B 70.87%
In not given Electrolysis; Pt anode, graphite cathode, area of the electrodes 30 cm^2, 1 A, 20 min, 0.420 mg/l SO2 soln.;A 98.52%
B 74.28%
In not given Electrolysis; Pt anode, graphite cathode, area of the electrodes 30 cm^2, 1 A, 20 min, 1.123 mg/l SO2 soln.;A 98.86%
B 74.2%

hydrgensulfide(1-)

hydrogen sulfite

A

14808-79-8

Sulfate

B

14383-50-7

thiosulphate ion

C

7704-34-9

sulfur

Conditions
ConditionsYield
In water byproducts: H2O; at ambient temp., molar ratio HS(1-) : HSO3(1-) = 1 : 2 must be adjusted as exactly as possible;; only small amts. of S and sulfate form;;A n/a
B 98%
C n/a
In water byproducts: H2O; at ambient temp., molar ratio HS(1-) : HSO3(1-) = 1 : 2 must be adjusted as exactly as possible;; only small amts. of S and sulfate form;;A n/a
B 98%
C n/a
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History

  Sulfur (CAS NO.7704-34-9) was known in ancient times and is referred to in the Torah (Genesis). English translations of the Bible commonly referred to burning sulfur as "brimstone", giving rise to the name of fire-and-brimstone' sermons, in which listeners are reminded of the fate of eternal damnation that await the unbelieving and unrepentant. It is from this part of the Bible that Hell is implied to "smell of sulfur" (likely due to its association with volcanic activity), although sulfur, in itself, is in fact odorless. The "smell of sulfur" usually refers to either the odor of hydrogen sulfide, e.g. from rotten egg, or of burning sulfur, which produces sulfur dioxide, the smell associated with burnt matches. The smell emanating from raw sulfur originates from a slow oxidation in the presence of air. Hydrogen sulfide is the principal odor of untreated sewage and is one of several unpleasant smelling sulfur-containing components of flatulence (along with sulfur-containing mercaptans). A natural form of sulfur known as shiliuhuang was known in China since the 6th century BC and found in Hanzhong. By the 3rd century, the Chinese discovered that sulfur could be extracted from pyrite. Chinese Daoists were interested in sulfur's flammability and its reactivity with certain metals, yet its earliest practical uses were found in traditional Chinese medicine. A Song Dynasty military treatise of 1044 AD described different formulas for Chinese black powder, which is a mixture of potassium nitrate (KNO3), charcoal, and sulfur. Early alchemists gave sulfur its own alchemical symbol which was a triangle at the top of a cross. In 1777, Antoine Lavoisier helped convince the scientific community that sulfur was an element and not a compound. In 1867, sulfur was discovered in underground deposits in Louisiana and Texas. The overlying layer of earth was quicksand, prohibiting ordinary mining operations; therefore, the Frasch process was developed.

Consensus Reports

EPA Extremely Hazardous Substances List. Reported in EPA TSCA Inventory.

Standards and Recommendations

DOT Classification:  4.1; Label: Flammable Solid

Specification

Sulfur (CAS NO.7704-34-9) is insoluble in water and sulfur in its powder is light yellow powder. It is soluble in carbon bisulfide, slightly soluble in ethanol and ethers. Its Synonyms are Sulfur, pharmaceutical ; Sulfur, precipitated [USP] ; Sulfur, sublimed [USP] ; AN-Sulfur Colloid Kit ; Agri-Sul ; Aquilite ; Asulfa-Supra ; Atomic sulfur ; Bensulfoid ; Brimstone .

Physical properties about Sulfur are:
(1)ACD/LogP: 6.117; (2)# of Rule of 5 Violations: 1; (3)ACD/LogD (pH 5.5): 6.12; (4)ACD/LogD (pH 7.4): 6.12; (5)ACD/BCF (pH 5.5): 26242.86; (6)ACD/BCF (pH 7.4): 26242.86; (7)Index of Refraction: 1.924; (8)Molar Refractivity: 65.296 cm3; (9)Molar Volume: 137.756 cm3; (10)Polarizability: 25.886 10-24cm3; (11)Surface Tension: 108.21900177002 dyne/cm; (12)Density: 1.862 g/cm3

Preparation of Sulfur:
Sulfur is produced from petroleum, natural gas, and related fossil resources, from which it is obtained mainly as hydrogen sulfide. Organosulfur compounds, undesirable impurities in petroleum, may be upgraded by subjecting them to hydrodesulfurization, which cleaves the C–S bonds:
R-S-R + 2 H2 → 2 RH + H2S

Uses of Sulfur: 
Sulfur is an essential element for all life, and is widely used in biochemical processes. In metabolic reactions, sulfur compounds serve as both fuels and respiratory (oxygen-alternative) materials for simple organisms. Sulfur in organic form is present in the vitamins biotin and thiamine, the latter being named for the Greek word for sulfur. Sulfur is an important part of many enzymes and in antioxidant molecules like glutathione and thioredoxin. Organically bonded sulfur is a component of all proteins, as the amino acids cysteine and methionine. Disulfide bonds are largely responsible for the mechanical strength and insolubility of the protein keratin, found in outer skin, hair, and feathers, and the element contributes to their pungent odor when burned.

Safety information of Sulfur:
When you are using this chemical, please be cautious about it as the following:(1)Keep away from sources of ignition - No smoking; (2)Keep away from combustible material; (3)Handle and open container with care; (4)When using, do not eat or drink; (5)When using, do not smoke; (6)Do not breathe dust; (7)Do not breathe gas/fumes/vapor/spray (appropriate wording to be specified by the manufacturer); (8)Avoid contact with skin; (9)Avoid contact with eyes; (10)In case of contact with eyes, rinse immediately with plenty of water and seek medical advice;

You can still convert the following datas into molecular structure:
(1)InChI=1/S ;
(2)Smiles=S;

The toxicity data of Sulfur is as follows:

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
dog LDLo intravenous 10mg/kg (10mg/kg)   Journal of the American Pharmaceutical Association, Scientific Edition. Vol. 29, Pg. 289, 1940.
guinea pig LDLo intraperitoneal 55mg/kg (55mg/kg)   Journal of the American Pharmaceutical Association, Scientific Edition. Vol. 29, Pg. 289, 1940.
mammal (species unspecified) LC50 inhalation 1660mg/m3 (1660mg/m3)   Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. Vol. 34(12), Pg. 8, 1990.
rabbit LDLo intravenous 5mg/kg (5mg/kg)   Journal of the American Pharmaceutical Association, Scientific Edition. Vol. 29, Pg. 289, 1940.
rabbit LDLo oral 175mg/kg (175mg/kg)   Journal of the American Pharmaceutical Association, Scientific Edition. Vol. 29, Pg. 289, 1940.
rat LD oral > 8437mg/kg (8437mg/kg)   Gigiena Truda i Professional'nye Zabolevaniya. Labor Hygiene and Occupational Diseases. Vol. 18(5), Pg. 48, 1974.
rat LDLo intravenous 8mg/kg (8mg/kg)   Journal of the American Pharmaceutical Association, Scientific Edition. Vol. 29, Pg. 289, 1940.