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Substance Name: Potassium dichromate
RN: 7778-50-9
UNII: T4423S18FM
InChIKey: KMUONIBRACKNSN-UHFFFAOYSA-N

Note

  • Chromic acid (H2Cr2O7), dipotassium salt. A compound having bright orange-red crystals and used in dyeing, staining, tanning leather, as bleach, oxidizer, depolarizer for dry cells, etc. Medically it has been used externally as an astringent, antiseptic, and caustic. When taken internally, it is a corrosive poison.

Molecular Formulas

  • Cr2-H2-O7.2K
  • Cr2-O7.2K

Molecular Weight

  • 294.181
 

Classification Codes

Classification Codes

  • Caustics
  • Coloring Agents
  • Human Data
  • Mutation Data
  • Noxae
  • Reproductive Effect
  • TSCA Flag R (Subject to the TSCA Section 6 Risk Management Rule)
  • Tumor Data

Superlist Classification Codes

  • Known to be a Carcinogen
  • Reportable Quantity (RQ) = 10 lb
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Names and Synonyms

Name of Substance

  • Potassium dichromate
  • Potassium dichromate(VI)

MeSH Heading

  • Potassium dichromate

Synonyms

  • Bichromate of potash
  • Caswell No. 690
  • CCRIS 2409
  • Chromium potassium oxide (K2Cr2O7)
  • Dichromic acid dipotassium salt
  • Dipotassium bichromate
  • Dipotassium dichromate
  • Dipotassium dichromium heptaoxide
  • EC 231-906-6
  • EINECS 231-906-6
  • EPA Pesticide Chemical Code 068302
  • HSDB 1238
  • Iopezite
  • Kalium bichromicum
  • Kaliumdichromat
  • Kaliumdichromat [German]
  • NSC 77372
  • Potassium bichromate
  • Potassium chromate (K2Cr2O7)
  • Potassium dichromate
  • Potassium dichromate (K2(Cr2O7))
  • Potassium dichromate (K2Cr2O7)
  • Potassium dichromate(VI)
  • SRM 935a
  • UNII-T4423S18FM

Systematic Names

  • Chromic acid (H2Cr2O7), dipotassium salt
  • Chromic acid (H2Cr2O7), potassium salt (1:2)
  • Dichromic acid (H2Cr2O7), dipotassium salt (8CI)
  • Dichromic acid, dipotassium salt
  • Potassium dichromate

Superlist Names

  • Chromic acid, dipotassium salt
  • Potassium bichromate
  • Potassium dichromate
  • Potassium dichromate [Chromium and chromium compounds]

Registry Numbers

CAS Registry Number

  • 7778-50-9

FDA UNII

  • T4423S18FM

System Generated Number

  • 0007778509

Molecular Formulas

Molecular Formulas

  • Cr2-H2-O7.2K
  • Cr2-O7.2K

Molecular Formula Fragments

  • COMPONENT
  • Cr2-H2-O7
  • Cr2-O7
  • K

Structure Descriptors

InChI

InChI=1S/2Cr.2K.7O/q;;2*+1;;;;;;2*-1

InChIKey

KMUONIBRACKNSN-UHFFFAOYSA-N

Smiles

[K+].[K+].[O-][Cr](=O)(=O)O[Cr](=O)(=O)[O-]

Toxicity

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
child LDLo oral 26mg/kg (26mg/kg) BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY)

LUNGS, THORAX, OR RESPIRATION: RESPIRATORY STIMULATION

GASTROINTESTINAL: NAUSEA OR VOMITING		 Zeitschrift fuer Kinderheilkunde. Vol. 81, Pg. 417, 1958.
child LDLo oral 50mg/kg (50mg/kg)   Gekkan Yakuji. Pharmaceuticals Monthly. Vol. 40, Pg. 2677, 1998.
dog LDLo oral 2829mg/kg (2829mg/kg)   Environmental Quality and Safety, Supplement. Vol. 1, Pg. 1, 1975.
dog LDLo unreported 2300ug/kg (2.3mg/kg)   Gigiena i Sanitariya. For English translation, see HYSAAV. Vol. 27(12), Pg. 77, 1962.
guinea pig LDLo oral 163mg/kg (163mg/kg)   Zeitschrift fuer Kinderheilkunde. Vol. 81, Pg. 417, 1958.
guinea pig LDLo subcutaneous 29400ug/kg (29.4mg/kg)   Environmental Quality and Safety, Supplement. Vol. 1, Pg. 1, 1975.
man LDLo oral 143mg/kg (143mg/kg) VASCULAR: BP LOWERING NOT CHARACTERIZED IN AUTONOMIC SECTION

LUNGS, THORAX, OR RESPIRATION: DYSPNEA

KIDNEY, URETER, AND BLADDER: URINE VOLUME DECREASED		 Gekkan Yakuji. Pharmaceuticals Monthly. Vol. 40, Pg. 2677, 1998.
monkey LDLo subcutaneous 40mg/kg (40mg/kg) KIDNEY, URETER, AND BLADDER: "CHANGES IN TUBULES (INCLUDING ACUTE RENAL FAILURE, ACUTE TUBULAR NECROSIS)" American Journal of Pathology. Vol. 9, Pg. 133, 1933.
mouse LD50 intraperitoneal 37mg/kg (37mg/kg)   Carcinogenesis Vol. 4, Pg. 1535, 1983.
mouse LD50 oral 190mg/kg (190mg/kg)   Sangyo Igaku. Japanese Journal of Industrial Health. Vol. 20, Pg. 590, 1978.
mouse LDLo subcutaneous 100mg/kg (100mg/kg)   Environmental Quality and Safety, Supplement. Vol. 1, Pg. 1, 1975.
rabbit LD50 skin 14mg/kg (14mg/kg) LUNGS, THORAX, OR RESPIRATION: ACUTE PULMONARY EDEMA

SKIN AND APPENDAGES (SKIN): "DERMATITIS, OTHER: AFTER SYSTEMIC EXPOSURE"

GASTROINTESTINAL: "HYPERMOTILITY, DIARRHEA"		 National Technical Information Service. Vol. OTS0537040,
rabbit LDLo intravenous 27900ug/kg (27.9mg/kg)   Environmental Quality and Safety, Supplement. Vol. 1, Pg. 1, 1975.
rabbit LDLo subcutaneous 10mg/kg (10mg/kg) KIDNEY, URETER, AND BLADDER: "CHANGES IN TUBULES (INCLUDING ACUTE RENAL FAILURE, ACUTE TUBULAR NECROSIS)"

KIDNEY, URETER, AND BLADDER: INTERSTITIAL NEPHRITIS		 Proceedings of the Society for Experimental Biology and Medicine. Vol. 9, Pg. 13, 1911.
rat LD50 intraperitoneal 28mg/kg (28mg/kg)   Gigiena i Sanitariya. For English translation, see HYSAAV. Vol. (5), Pg. 30, 1997.
rat LD50 oral 25mg/kg (25mg/kg) BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY)

SENSE ORGANS AND SPECIAL SENSES: OTHER: EYE

BEHAVIORAL: ATAXIA		 National Technical Information Service. Vol. OTS0545929,