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LC4926 Potassium dichromate
cryst. extra pure


Order number Packaging Quantity Price €
AC31926 Plastic bottle 1 kg Inquire
AC31926 Plastic bottle 5 kg Inquire


Product information
Synonyms Potassium bichromate, Potassium pyrochromate
Hill Formula Cr2K2O7
Chemical formula K2Cr2O7
HS Code 2841 50 00
EC number 231-906-6
Molar mass 294.19 g/mol
EC index number 024-002-00-6
CAS number 7778-50-9


Chemical and physical data
Solubility 130 g/l (20 °C)
Melting point 398 °C
Molar mass 294.19 g/mol
Density 2.69 g/cm3 (20 °C)
Bulk density 1250 kg/m3
pH value 4.0 (10 g/l, H2O)
Boiling point >500 °C (1013 hPa)


Safety information according to GHS
Hazard Statement(s) H350: May cause cancer.
H340: May cause genetic defects.
H360FD: May damage fertility. May damage the unborn child.
H272: May intensify fire; oxidiser.
H330: Fatal if inhaled.
H301: Toxic if swallowed.
H312: Harmful in contact with skin.
H372: Causes damage to organs through prolonged or repeated exposure.
H314: Causes severe skin burns and eye damage.
H334: May cause allergy or asthma symptoms or breathing difficulties if inhaled.
H317: May cause an allergic skin reaction.
H410: Very toxic to aquatic life with long lasting effects.
Precautionary Statement(s) P201: Obtain special instructions before use.
P280: Wear protective gloves.
P301 + P330 + P331: IF SWALLOWED: rinse mouth. Do NOT induce vomiting.
P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
P304 + P341: IF INHALED: If breathing is difficult, remove victim to fresh air and keep at rest in a position comfortable for breathing.
P308 + P313: IF exposed or concerned: Get medical advice/attention.
Signal Word Danger
Hazard Pictogram(s)

RTECS HX7680000
Storage class Oxidizing agents (TRG 515 Group 2+3)
WGK WGK 3 highly water endangering
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
R Phrase R 45-46-60-61- 8-21-25-26-34-42/43-48/23-50/53
May cause cancer.May cause heritable genetic damage.May impair fertility.May cause harm to the unborn child.Contact with combustible material may cause fire.Also harmful in contact with skin.Also toxic if swallowed.Also very toxic by inhalation.Causes burns.May cause sensitization by inhalation and skin contact.Also toxic: danger of serious damage to health by prolonged exposure through inhalation.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.
Categories of danger carcinogenic, mutagenic, toxic for reproduction, oxidizing, very toxic, corrosive, sensitizing, dangerous for the environment
Hazard Symbol

Very toxic
Dangerous for the environment



Transport information
Declaration (transport by sea) IMDG-Code UN 3086 TOXIC SOLID, OXIDIZING, N.O.S.(POTASSIUM DICHROMATE), 6.1 (5.1), II
Declaration (transport by air) IATA-DGR UN 3086 TOXIC SOLID, OXIDIZING, N.O.S.(POTASSIUM DICHROMATE), 6.1 (5.1), II


Toxicological data
LD 50 oral LD50 rat 25 mg/kg
LD 50 dermal LD50 rat 1170 mg/kg