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7782-49-2

7782-49-2 structural image
Product Name: Selenium
Formula: Se
Synonyms: SE000500;SE006010;SE006110;Selenium;Selenium black 99+
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CHEMICAL AND PHYSICAL PROPERTIES

Physical Description Selenium is a reddish colored powder that may become black upon exposure to air. It is toxic by ingestion. It is used to manufacture electronic components and rubber.
Color/Form Selenium exists in several allotropic forms. 3 are generally recognized ... Selenium can be prepd with either amorphous or crystalline structure. ... Amorphous is either red, in powder form or black, in vitreous form. Crystalline monoclinic selenium is deep red; crystalline hexagonal form, the most stable variety, is a metallic gray.
Boiling Point 1265 °F at 760 mmHg (NIOSH, 2023)
Melting Point 392 °F (NIOSH, 2023)
Solubility Insoluble (NIOSH, 2023)
Density 4.28 (NIOSH, 2023) - Denser than water; will sink
Vapor Pressure 0 mmHg (approx) (NIOSH, 2023)
LogP 5
Decomposition When heated to decomp ... emits toxic fumes of /selenium/.
Viscosity 221 mPa-S (= cP) at 220 °C; 70 cP at 360 °C
Corrosivity Strongly corrosive, especially at high temperature.
Heat of Combustion -225.1 kJ/mol at 298 K
Heat of Vaporization 59.7 kJ/mol
Surface Tension 105.5 dyn/cm at 220 °C; 95.2 dyn/cm at 310 °C (liquid)
Other Experimental Properties Combines directly with hydrogen, with the halogens (excluding iodine); oxidized to selenious acid by nitric acid, to selenic acid by sulfuric acid; reduces hot aqueous soln of silver and gold salts with formation of silver selenide and metallic gold, respectively
Chemical Classes Other Classes -> Other Inorganic Compounds

SAFETY INFORMATION

Signal word Danger
Pictogram(s)

Skull and Crossbones
Acute Toxicity
GHS06

Health Hazard
GHS08
GHS Hazard Statements H373:Specific target organ toxicity, repeated exposure
H413:Hazardous to the aquatic environment, long-term hazard
Precautionary Statement Codes P260:Do not breathe dust/fume/gas/mist/vapours/spray.
P264:Wash hands thoroughly after handling.
P264:Wash skin thouroughly after handling.
P273:Avoid release to the environment.
P314:Get medical advice/attention if you feel unwell.
P301+P310:IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.

COMPUTED DESCRIPTORS

Molecular Weight 78.97 g/mol
Hydrogen Bond Donor Count 0
Hydrogen Bond Acceptor Count 0
Rotatable Bond Count 0
Exact Mass 79.91652 g/mol
Monoisotopic Mass 79.91652 g/mol
Topological Polar Surface Area 0 Ų
Heavy Atom Count 1
Formal Charge 0
Complexity 0
Isotope Atom Count 0
Defined Atom Stereocenter Count 0
Undefined Atom Stereocenter Count 0
Defined Bond Stereocenter Count 0
Undefined Bond Stereocenter Count 0
Covalently-Bonded Unit Count 1
Compound Is Canonicalized Yes

PRODUCT INTRODUCTION

description

Selenium is a naturally occurring mineral element that is distributed widely in nature in most rocks and soils. In its pure form, it exists as metallic gray to black hexagonal crystals, but in nature it is usually combined with sulfide or with silver, copper, lead, and nickel minerals. Most processed selenium is used in the electronics industry, but it is also used: as a nutritional supplement; in the glass industry; as a component of pigments in plastics, paints, enamels, inks, and rubber; in the preparation of pharmaceuticals; as a nutritional feed additive for poultry and livestock; in pesticide formulations; in rubber production; as an ingredient in antidandruff shampoos; and as a constituent of fungicides. Radioactive selenium is used in diagnostic medicine.

RELATED SUPPLIERS

Chaitanya Group of Industries

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product:7782-49-2 Selenium 99%

Himalaya Industries

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product:7782-49-2 98%

Ritesh Chemical Industries

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ARRAKIS INDUSTRIES LLP

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product:SELENIUM (METAL) POWDER 7782-49-2 99%
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