Merck 107714 0050 (Selenium Black 99+) 50 GR.

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Description
Catalogue Number	107714

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Product Information
CAS number	7782-49-2
EC index number	034-001-00-2
EC number	231-957-4
Hill Formula	Se
Molar Mass	78.96 g/mol
HS Code	2804 90 00
Quality Level	MQ300

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Physicochemical Information
Boiling point	685 °C (1013 hPa)
Density	4.28 g/cm3 (20 °C)
Melting Point	217 °C
Vapor pressure	>0.001 hPa (20 °C)
Bulk density	1270 kg/m3
Solubility	<0.021 mg/l slightly soluble

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Toxicological Information
LD 50 oral	LD50 Rat 6700 mg/kg

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Safety Information according to GHS
Hazard Pictogram(s)	\n\n
Hazard Statement(s)	H301 + H331: Toxic if swallowed or if inhaled.\nH373: May cause damage to organs through prolonged or repeated exposure.\nH413: May cause long lasting harmful effects to aquatic life.
Precautionary Statement(s)	P260: Do not breathe dust.\nP264: Wash skin thoroughly after handling.\nP273: Avoid release to the environment.\nP301 + P310: IF SWALLOWED: Immediately call a POISON CENTER/doctor.\nP304 + P340 + P311: IF INHALED: Remove person to fresh air and keep comfortable for breathing. Call a POISON CENTER/doctor.\nP314: Get medical advice/ attention if you feel unwell.
Signal Word	Danger
Storage class	6.1C Combustible, acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects
WGK	WGK 2 obviously hazardous to water
Disposal	17\nInorganic selenium compounds are toxic and must be handled with caution. Container E. Elemental selenium can be recovered by first oxidizing the salts in aqueous solution with concentrated Nitric acid (Cat.No. 100443). The addition of Sodium hydrogen sulfite solution (Item No. 806356) then causes elemental selenium to precipitate out. Aqueous phase: Container D.

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Safety Information
Categories of danger	toxic, dangerous for the environment

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Storage and Shipping Information
Storage	NoTempLimit

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Transport Information
Declaration (railroad and road) ADR, RID	UN 3288 , 6.1, III
Declaration (transport by air) IATA-DGR	UN 3288 , 6.1, III
Declaration (transport by sea) IMDG-Code	UN 3288 , 6.1, III

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Specifications
Identity	passes test
Assay (gravimetrically)	≥ 99.0 %
Cu (Copper)	≤ 0.005 %
Fe (Iron)	≤ 0.05 %
Pb (Lead)	≤ 0.05 %
Residue on ignition	≤ 0.5 %
Particle size (> 150 µm)	≤ 5 %