CAS #:

Linear Formula:


MDL Number:


EC No.:



(2N) 99% Sodium Dichromate
Pricing > SDS > Data Sheet >
(3N) 99.9% Sodium Dichromate
Pricing > SDS > Data Sheet >
(4N) 99.99% Sodium Dichromate
Pricing > SDS > Data Sheet >
(5N) 99.999% Sodium Dichromate
Pricing > SDS > Data Sheet >

Sodium Dichromate Properties (Theoretical)

Compound Formula Cr2Na2O7
Molecular Weight 261.97
Appearance Orange or red crystalline solid
Melting Point 357 °C
Boiling Point 400 °C
Density 2.35 g/cm3
Solubility in H2O N/A
Exact Mass 261.824956
Monoisotopic Mass 261.824956

Sodium Dichromate Health & Safety Information

Signal Word Danger
Hazard Statements H272-H301-H312-H314-H317-H330-H334-H340-H350-H360FD-H372-H410
Hazard Codes T+, N, O
Risk Codes 45-46-60-61-8-21-25-26-34-42/43-48/23-50/53
Safety Statements 53-45-60-61
RTECS Number HX7750000
Transport Information UN 3290 6.1/PG 2
WGK Germany 3

About Sodium Dichromate

Chromate IonSodium Dichromate is generally immediately available in most volumes. Hydrate or anhydrous forms may be purchased. High purity, submicron and nanopowder forms may be considered. American Elements produces to many standard grades when applicable, including Mil Spec (military grade); ACS, Reagent and Technical Grade; Food, Agricultural and Pharmaceutical Grade; Optical Grade, USP and EP/BP (European Pharmacopoeia/British Pharmacopoeia) and follows applicable ASTM testing standards. Typical and custom packaging is available. Additional technical, research and safety (MSDS) information is available as is a Reference Calculator for converting relevant units of measurement.

Sodium Dichromate Synonyms

Disodium salt, Sodium bichromate, Bichromate of soda, Disodium dichromate, Sodium dichromate(VI), chromic acid (h2cr2o7), disodium salt; di chromic acid (h2cr2o7), disodium salt; chromium sodium oxide (cr3na2o7)

Chemical Identifiers

Linear Formula Na2Cr2O7
MDL Number N/A
EC No. 234-190-3
Beilstein/Reaxys No. N/A
Pubchem CID 25408
IUPAC Name disodium; oxido-(oxido(dioxo) chromio)oxy-dioxochromium
SMILES [Na+].[Na+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O
InchI Identifier InChI=1S/2Cr.2Na.7O/q;;2*+1;;;;;;2*-1

Packaging Specifications

Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Shipping documentation includes a Certificate of Analysis and Safety Data Sheet (SDS). Solutions are packaged in polypropylene, plastic or glass jars up to palletized 440 gallon liquid totes, and 36,000 lb. tanker trucks.

Related Elements


Sodium Bohr ModelSee more Sodium products. Sodium (atomic symbol: Na, atomic number: 11) is a Block D, Group 5, Period 4 element with an atomic weight of 22.989769. The number of electrons in each of Sodium's shells is [2, 8, 1] and its electron configuration is [Ne] 3s1. The sodium atom has a radius of 185.8 pm and a Van der Waals radius of 227 pm. Sodium was discovered and first isolated by Sir Humphrey Davy in 1807. In its elemental form, sodium has a silvery-white metallic appearance. It is the sixth most abundant element, making up 2.6 % of the earth's crust. Sodium does not occur in nature as a free element and must be extracted from its compounds (e.g., feldspars, sodalite, and rock salt). The name Sodium is thought to come from the Arabic word suda, meaning "headache" (due to sodium carbonate's headache-alleviating properties), and its elemental symbol Na comes from natrium, its Latin name.


See more Chromium products. Chromium (atomic symbol: Cr, atomic number: 24) is a Block D, Group 6, Period 4 element with an atomic weight of 51.9961. Chromium Bohr ModelThe number of electrons in each of Chromium's shells is 2, 8, 13, 1 and its electron configuration is [Ar] 3d5 4s1. Chromium was first discovered by Louis Nicolas Vauquelin in 1797. It was first isolated in 1798, also by Louis Nicolas Vauquelin. The chromium atom has a radius of 128 pm and a Van der Waals radius of 189 pm. In its elemental form, chromium has a lustrous steel-gray appearance. Elemental ChromiumChromium is the hardest metal element in the periodic table and the only element that exhibits antiferromagnetic ordering at room temperature, above which it tranforms into a paramagnetic solid. The most common source of chromium is chromite ore (FeCr2O4). Due to its various colorful compounds, Chromium was named after the Greek word 'chroma' meaning color.


June 17, 2021
Los Angeles, CA
Each business day American Elements' scientists & engineers post their choice for the most exciting materials science news of the day

From milk protein, a plastic foam that gets better in a tough environment