| Identification | More | [Name]
Sodium dichromate dihydrate | [CAS]
7789-12-0 | [Synonyms]
SODIUM BICHROMATE
SODIUM BICHROMATE DIHYDRATE
SODIUM DICHROMATE
SODIUM DICHROMATE 2H2O
SODIUM DICHROMATE-2-HYDRATE
SODIUM DICHROMATE DIHYDRATE
SODIUM DICHROMATE, HYDROUS
chromicacid(h2cr2o7),disodiumsalt,dihydrate
dichromicacid(h2cr2o7),disodiumsalt,dihydrate
Dichromicacid,disodiumsalt,dihydrate
Disodiumdichromatedihydrate
Sodiumbichromateanhydrous
Sodium dichromate dihydrate (Na2Cr2O7.2H2O)
Sodium dichromate dihydrate (VI)
SODIUM DICHROMATE DIHYDRATE, FINE CRYST.
SODIUM DICHROMATE DIHYDRATE ACS REAGENT
SODIUM DICHROMATE-2-HYDRATE R. G., REAG.
SODIUM DICHROMATE DIHYDRATE, 99.995%
SODIUM DICHROMATE-2-HYDRATE PURE
SODIUM DICHROMATE DIHYDRATE REAGENTPLU& | [EINECS(EC#)]
234-190-3 | [Molecular Formula]
Cr2H4Na2O9 | [MDL Number]
MFCD00149166 | [Molecular Weight]
298 | [MOL File]
7789-12-0.mol |
| Chemical Properties | Back Directory | [Appearance]
Sodium chromate, including the hexahydrate, is yellow crystalline solids that can also be used in solution. Disodium dichromate (10588-01-9): | [Melting point ]
91 °C(lit.) | [Boiling point ]
400°C | [density ]
2,348 g/cm3 | [vapor density ]
10 (vs air) | [storage temp. ]
Store at +5°C to +30°C. | [solubility ]
Methanol (Slightly, Sonicated) | [form ]
Solid | [color ]
Red-orange | [Specific Gravity]
2.348 | [Odor]
Odorless | [PH Range]
3.5-4.0 | [Water Solubility ]
730 g/L (20 ºC) | [Sensitive ]
Hygroscopic | [Merck ]
14,8609 | [Dielectric constant]
2.9（Ambient） | [CAS DataBase Reference]
7789-12-0(CAS DataBase Reference) | [EPA Substance Registry System]
7789-12-0(EPA Substance) |
| Safety Data | Back Directory | [Hazard Codes ]
O,T+,N | [Risk Statements ]
R45:May cause cancer.
R60:May impair fertility.
R61:May cause harm to the unborn child.
R8:Contact with combustible material may cause fire.
R21:Harmful in contact with skin.
R25:Toxic if swallowed.
R26:Very Toxic by inhalation.
R34:Causes burns.
R42/43:May cause sensitization by inhalation and skin contact .
R48/23:Toxic: danger of serious damage to health by prolonged exposure through inhalation .
R50/53:Very Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment . | [Safety Statements ]
S53:Avoid exposure-obtain special instruction before use .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
S60:This material and/or its container must be disposed of as hazardous waste .
S61:Avoid release to the environment. Refer to special instructions safety data sheet . | [RIDADR ]
UN 3086 6.1/PG 1
| [WGK Germany ]
3
| [RTECS ]
HX7750000
| [TSCA ]
Yes | [HazardClass ]
5.1 | [PackingGroup ]
III | [HS Code ]
28413000 |
| Raw materials And Preparation Products | Back Directory | [Raw materials]
Sulfuric acid-->Sodium carbonate-->Sodium sulfate-->Aluminum hydroxide-->CALCIUM CARBONATE-->Chromium(III) oxide-->HEAVY CUT RESIDUE OIL-->DOLOMITE-->Dolomite (CaMg(CO3)2), dead-burned refractory-->Chrome iron ore | [Preparation Products]
Lead chromate-->Pale chrome yellow-->Sodium chromate tetrahydrate-->Potassium orotate-->1,2,4-Trimethoxybenzene-->Methylene Blue-->Acenaphthenequinone-->Menadione-->Basic chromic sulfate-->Ammonium dichromate-->Methyl 4-aminopyridine-3-carboxylate-->Acid Violet 17-->Pirenoxine-->Chromium sulfate,basic,solid-->Dehydrocholic acid-->Sodium chromate-->TRIMETHYLQUINONE-->Phenanthrenequinone-->6-CARBOXY-2,4-DIHYDROXYPYRIMIDINE MONOSODIUM SALT-->hydrogen [4-[[4-(diethylamino)phenyl][4-[ethyl[(3-sulphonatobenzyl)amino]-o-tolyl]methylene]-3-methylcyclohexa-2,5-dien-1-ylidene](ethyl)(3-sulphonatobenzyl)ammonium, sodium salt-->Chromic chloride hexahydrate-->4-AMINO-1,8-NAPHTHALIMIDE-->1-(2,6-DIMETHYLPHENOXY)ACETONE-->(2,6-DIMETHYLPHENOXY)ACETOXIME-->Strontium chromate-->Probenecid-->Fast Green FCF-->4-Nitro-1,8-Naphthalenedicarboxylic Acid-->water-proofing agnet AC-->LITHIUM DICHROMATE-->4,5-Dichloronaphthalene-1,8-dicarboxylic anhydride-->Pigment Yellow 34-->ACID BLUE 15-->9-Fluorenone-2-carboxylic acid-->sulfomethylated gallnuat sodium tannic acid-->Lemon chrome yellow 501-->acidizig fluid gelling agent CT^{1～6^}-->ChroMiuM(III) sulfate hydrate-->ferric chomium lignin sulfonate |
| Hazard Information | Back Directory | [General Description]
Solid orange-yellow crystal or powder. | [Reactivity Profile]
ZINC BICHROMATE(7789-12-0) can react with reducing agents to generate heat and products that may be gaseous (causing pressurization of closed containers). The products may themselves be capable of further reactions (such as combustion in the air). Reactions may be rapid but often requires initiation (heat, spark, catalyst, addition of a solvent). Can react violently with active metals, cyanides, esters, and thiocyanates. | [Air & Water Reactions]
Water soluble (hot water). | [Health Hazard]
INHALATION: Corrosive to mucous membranes continuous exposure may lead to perforation of nasal septum. EYES: Conjunctivitis and lacrimation. SKIN: Corrosive producing deep penetrating ulcers to exposed area. Slow to heal. INGESTION: Has a harsh metallic taste. May cause vertigo, thirst, abdominal pain, vomiting, shock, convulsions and coma. | [Potential Exposure]
Used to make dyes, inks, pigments, and other chromates; in leather tanning, a corrosion inhibitor in circulating water systems; metal treatment; a drilling mud additive; chemical intermediate for chromium catalysts; colorimetry, oxidizing agent; bleaching agent; an algicide, fungicide, insecticide; in wood preservation. | [First aid]
If this chemical gets into the eyes, remove any contact lenses at once and irrigate immediately for at least 15 minutes, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts the skin, remove contaminated clothing and wash immediately with soap and water. Seek medical attention immediately. If this chemical has been inhaled, remove from exposure, begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR if heart action has stopped. Transfer promptly to a medical facility. When this chemical has been swallowed, get medical attention. If victim is conscious, administer water, or milk. Do not induce vomiting. | [Shipping]
UN3087 Oxidizing solid, toxic, n.o.s., Hazard Class: 5.1; Labels: 5.1-Oxidizer, 6.1-Poisonous materials, Technical Name Required. UN3085 Oxidizing solid, corrosive, n.o.s., Hazard Class: 5.1; Labels: 5.1-Oxidizer, 8-Corrosive material, Technical Name Required. | [Incompatibilities]
Aqueous solution in a base. A strong oxidizer. Violent reaction with reducing agents; combustibles, strong acids; organic materials. | [Chemical Properties]
Orange-yellow powder. Soluble in acids
and hot water; insoluble in alcohol and ether. | [Chemical Properties]
Sodium chromate, including the hexahydrate, is yellow crystalline solids that can also be used in solution. Disodium dichromate (10588-01-9): | [Uses]
It is used in preparation of titrant in redox titrations. | [Uses]
Sodium Dichromate Dihydrate is used as a catalyst in the synthesis of Endoperoxide II. Strong oxidizing agent in organic synthesis. Used in metal finishing as an aid in corrosion resistance. | [Definition]
A red crystallinesolid, Na2Cr2O7.2H2O, solublein water and insoluble in ethanol. Itis usually known as the dihydrate(r.d. 2.52), which starts to lose waterabove 100°C; the compound decomposesabove 400°C. It is made bymelting chrome iron ore with limeand soda ash and acidification of thechromate thus formed. Sodiumdichromate is cheaper than the correspondingpotassium compound buthas the disadvantage of being hygroscopic.It is used as a mordant in dyeing,as an oxidizing agent in organicchemistry, and in analytical chemistry. | [Hazard]
Toxic by ingestion and inhalation. | [Purification Methods]
Crystallise the dichromate from small volumes of H2O by evaporation to crystallisation. Its solubility in H2O is 238% at 0o and 508% at boiling. The red dihydrate is slowly dehydrated by heating at 100o for long periods. It is deliquescent and is a powerful oxidising agent—do not place it in contact with skin— wash immediately as it is caustic. (Possible carcinogen.) Sodium dihydrogen orthophosphate ( 2 H2O) [13472-35-0 (2H2O), 10049-21-5 (H2O), 7558-80-7 (anhydrous)] M 156.0, m 60o(dec), d 4 1.91. Crystallise it from warm water (0.5mL/g) by chilling. |
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