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CAS No.: | 7778-50-9 |
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Name: | Potassium dichromate(VI) |
Molecular Structure: | |
Formula: | Cr2H2O7 . 2K |
Molecular Weight: | 294.20 |
Synonyms: | Chromicacid (H2Cr2O7), dipotassium salt (9CI);Dichromic acid (H2Cr2O7), dipotassiumsalt (8CI);C 501;Chromium potassium oxide (K2Cr2O7);Dichromic aciddipotassium salt;Dipotassium bichromate;Dipotassium bichromate (K2Cr2O7);Dipotassium dichromate;Dipotassium dichromate (K2Cr2O7);Dipotassiumdichromium heptaoxide;Potassium bichromate;Potassium dichromate;Potassiumdichromate (K2(Cr2O7));Potassium dichromate(VI);SRM 935a; |
EINECS: | 231-906-6 |
Density: | 2.676 g/cm3 |
Melting Point: | 398 °C |
Boiling Point: | 500 °C |
Flash Point: | 50°F |
Solubility: | 125 g/L (20 °C) in water |
Appearance: | Orange red crystals |
Hazard Symbols: | T, N, T+, O |
Risk Codes: | 45-46-60-61-8-21-25-26-34-42/43-48/23-50/53-52/53-20-48/20-23-51/53-22-36/37/38 |
Safety: | 53-45-60-61-36/37-23-26 |
Transport Information: | UN 3086 6.1/PG 1 |
PSA: | 117.97000 |
LogP: | -0.89720 |
The Potassium bichromate , with the CAS register number 7778-50-9, has other names as bichromateofpotash;chromicaci (h2cr2o7),dipotassiumsalt;chromicacid,dipotassiumsalt;chromicacid[h2cr2o7],dipotassiumsalt;dichromatedepotassium;Dichromicacid,dipotassiumsalt;dichromicacid[h2cr2o7],dipotassiumsalt;dichromicaciddipotassiumsalt .
It is a kind of orange red monoclinic system or triclinic system crystalline, and it is slightly soluble in water and easily soluble in hot water while insoluble in ethyl alcohol .
As for its usage, it is widely used in many field. First, it could be used as the chrome alum, chromium oxide green, chrome yellow pigment. Then, it could be mixed with the feldspar powder and quartz sand to calcine and then comes enamel powder; It is used in modulating the match head to take the function of anti-moisture; It could be applied to as the tanning extracts and mordant in dyeing and printing; It could be used in making spice to be as oxidant. Besides, it is applied in welding rod, printing ink,passivation of metals and also as the oxidant and catalyst for organic synthesis and the raw material of the medicines.
It is a kind of very harmful chemical and you need to very cautious while dealing with it. Because it is dangerous for the environment, and it is toxic and oxidizing. Besides, it may cause cancer, heritable genetic damage, and impair fertility and it may cause harm to the unborn child, and etc. So take these instructions while using it. Wash hands, face, forearms and neck when exiting restricted areas; Wash hands before eating and do not eat, drink, or smoke in workplace; Wear special protective equipment for maintenance break-in or where exposures may exceed established exposure levels. Shower, dispose of outer clothing, change to clean garments at the end of the day; Protect against physical damage; Remove and dispose of any spilled dichromates; do not return to original containers;
When it comes to its storing, containers of this material may be hazardous when empty since they retain product residues (dust, solids); observe all warnings and precautions listed for the product; Store in a dry location separate from combustible, organic or other readily oxidizable materials. Avoid storage on wood floors.
What's more, its product categories are including the followings: inorganics;chromatesvolumetric solutions;n - r;oxidation;salt solutions;synthetic reagents;n - rvolumetric solutions;reference material sodium thiosolfatetitration;salt solutionsanalytical reagents;by reference material;solution containers (volpac);volumetric solutions;waste water;water test;reference material sodium thiosolfate;chromatesconcentrates (e.g. fixanal);concentrates (e.g. fixanal);reference material sodium thiosulfatetitration;salt concentrates.
Below are the toxicity information of this kind of chemcial:
Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
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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) | SENSE ORGANS AND SPECIAL SENSES: OTHER: EYE BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY) BEHAVIORAL: ATAXIA | National Technical Information Service. Vol. OTS0545929, |