Merck 106336 Sodium dichromate dihydrate for analysis EMSURE® ACS CAS No.: 7789-12-0 250 gr

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LB.M.106336.0250

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Synonym(s): Sodium dichromate dihydrate, Sodium bichromate, Sodium pyrochromate Empirical Formula (Hill Notation): Cr2Na2O7 · 2H2O CAS Number: 7789-12-0 Molecular Weight: 298.00 MDL number: MFCD00149166 UNSPSC Code: 12352302 EC Index Number: 234-190-3 NACRES: NA.21 Assay: 99.5-100.5% (iodometric) Grade: ACS reagent Form: solid

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MERCK 106336

Sodium dichromate dihydrate for analysis EMSURE® ACS

Description
Catalogue Number	106336
Synonyms	Sodium bichromate, Sodium pyrochromate

Product Information
CAS number	7789-12-0
EC index number	024-004-00-7
EC number	234-190-3
Grade	ACS
Hill Formula	Cr₂Na₂O₇*2H₂O
Chemical formula	Na₂Cr₂O₇ * 2 H₂O
Molar Mass	298.00 g/mol
HS Code	2841 30 00
Quality Level	MQ300

Physicochemical Information
Boiling point	400 °C (1013 hPa) (decomposition)
Density	2.35 g/cm3 (20 °C)
Melting Point	356.7 °C (anhydrous substance)
pH value	3.5 (100 g/l, H₂O, 20 °C)
Bulk density	1200 kg/m3
Solubility	731.8 g/l

Toxicological Information
LD 50 oral	LD50 Rat 50 mg/kg
LD 50 dermal	LD50 Rabbit 1000 mg/kg

Safety Information according to GHS
Hazard Pictogram(s)
Hazard Statement(s)	H340: May cause genetic defects. H350: May cause cancer. H360FD: May damage fertility. May damage the unborn child. H272: May intensify fire; oxidizer. H301: Toxic if swallowed. H312: Harmful in contact with skin. H314: Causes severe skin burns and eye damage. H317: May cause an allergic skin reaction. H330: Fatal if inhaled. H334: May cause allergy or asthma symptoms or breathing difficulties if inhaled. H372: Causes damage to organs through prolonged or repeated exposure. H410: Very toxic to aquatic life with long lasting effects.
Precautionary Statement(s)	P201: Obtain special instructions before use. P221: Take any precaution to avoid mixing with combustibles, heavy-metal compounds, acids and alkalis. P273: Avoid release to the environment. P280: Wear protective gloves/ protective clothing/ eye protection/ face protection. P301 + P330 + P331: IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. P302 + P352: IF ON SKIN: Wash with plenty of soap and water. P304 + P340: IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing. P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P308 + P310: IF exposed or concerned: immediately call a POISON CENTER or doctor/ physician.
Signal Word	Danger
RTECS	HX7750000
Storage class	5.1B Oxidizing hazardous materials
WGK	WGK 3 highly hazardous to water
Disposal	22 Inorganic peroxides and oxidants as well as bromine and iodine should be rendered harmless by reduction with acidic sodium thiosulfate solution (Cat. No. 106513); container D or E. Slightly soluble oxidants should be collected separately in container E or I.

Safety Information
Hazard Symbols	Very toxic Oxidising Dangerous for the environment
Categories of danger	carcinogenic, mutagenic, toxic for reproduction, very toxic, oxidizing, corrosive, sensitizing, dangerous for the environment
R Phrase	R 45-46-60-61-21-25-26-48/23- 8-34-42/43-50/53 May cause cancer.May cause heritable genetic damage.May impair fertility.May cause harm to the unborn child.Also harmful in contact with skin.Also toxic if swallowed.Also very toxic by inhalation.Also toxic: danger of serious damage to health by prolonged exposure through inhalation.Contact with combustible material may cause fire.Causes burns.May cause sensitisation by inhalation and skin contact.Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
S Phrase	S 53-45-60-61 Avoid exposure - obtain special instructions before use.In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible).This material and its container must be disposed of as hazardous waste.Avoid release to the environment. Refer to special instructions/ Safety data sheets.

Storage and Shipping Information
Storage	Store at +5 °C to +30 °C.

Transport Information
Declaration (railroad and road) ADR, RID	UN 3086 , 6.1 (5.1), II
Declaration (transport by air) IATA-DGR	UN 3086 , 6.1 (5.1), II
Declaration (transport by sea) IMDG-Code	UN 3086 , 6.1 (5.1), II

Specifications
Assay (iodometric)	99.5 - 100.5 %
Identity	passes test
Insoluble matter	≤ 0.005 %
Chloride (Cl)	≤ 0.002 %
Sulfate (SO₄)	≤ 0.01 %
Al (Aluminium)	≤ 0.002 %
Ca (Calcium)	≤ 0.002 %
Cu (Copper)	≤ 0.001 %
Fe (Iron)	≤ 0.002 %
K (Potassium)	≤ 0.01 %
Mg (Magnesium)	≤ 0.005 %
Pb (Lead)	≤ 0.002 %

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