Molekula
Potassium dichromate
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Potassium dichromate is an orange crystalline inorganic salt widely used in industrial processes, including leather tanning, chrome plating, and as an oxidizing agent in chemical synthesis. It is also employed in analytical chemistry for volumetric analysis and as a mordant in dyeing. This chemical has a CAS number of 7778-50-9, a molecular formula of K2Cr2O7, and a molecular weight of 294.18 g/mol. It should be stored at ambient conditions but handled with caution due to its hazardous nature, indicated by the signal word "Danger." Molekula supplies potassium dichromate from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
Pack sizes & pricing
Pricing on request — packs available from research to bulk quantities.
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Specifications
| Property | Value |
|---|---|
| Appearance | Orange-red triclinic crystal plate |
| Water | ≤0.03% |
| Chloride (Cl-) | ≤0.05% |
| Assay | ≥99.7% |
| Water insoluble matter | ≤0.02% |
| Sulphates (SO4)(2-) | ≤0.02% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Transport Class | 6.1 (5.1) |
| Packing Group | I |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Orange-red triclinic crystals |
| Odour | Odorless, no distinctive odor |
| Melting Point | 398 °C |
Source: PubChem CID 24502 (HSDB, ICSC)
Identification
| Property | Value |
|---|---|
| SKU | 50025920 |
| CAS Number | 7778-50-9 |
| IUPAC Name | dipotassium;oxido-(oxido(dioxo)chromio)oxy-dioxochromium |
| EC Number | 231-906-6 |
| Molecular Formula | K2Cr2O7 |
| Molecular Weight | 294.18 |
| Exact Mass | 293.7728 |
| SMILES | [O-][Cr](=O)(=O)O[Cr](=O)(=O)[O-].[K+].[K+] |
| InChIKey | KMUONIBRACKNSN-UHFFFAOYSA-N |
| InChI | InChI=1S/2Cr.2K.7O/q;;2*+1;;;;;;2*-1 |
| PubChem CID | 24502 |
| UN Number | UN3086 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | - |
| Tariff Code | 2841500000 |
Safety & GHS
-
Oxidizing
GHS03
-
Corrosive
GHS05
-
Toxic
GHS06
-
Serious Health Hazard
GHS08
-
Hazardous to the Environment
GHS09
Hazard statements
- H272 May intensify fire; oxidizer
- H300 + H310 + H330 Fatal if swallowed, in contact with skin or if inhaled
- H314 (sub cat. 1B) Causes severe skin burns and eye damage
- H317 May cause an allergic skin reaction
- H334 May cause allergy or asthma symptoms or breathing difficulties if inhaled
- H340 May cause genetic defects
- H350 May cause cancer
- H360FD May damage fertility. May damage the unborn child.
- H372 Causes damage to organs through prolonged or repeated exposure
- H410 Very toxic to aquatic life with long lasting effects
Precautionary statements
- P210 Keep away from heat/sparks/open flames/hot surfaces - No smoking
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician
- P303+361 IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse with water/shower
- P304+340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
- P308+313 IF exposed or concerned: Get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- Bichromate of potash
- Dichromic acid dipotassium salt
- Dipotassium bichromate
- Dipotassium dichromate
- Dipotassium dichromium heptaoxide
- Iopezite
- Kaliumdichromat
- Potassium bichromate
- Potassium dichromate(VI)
- SRM 935a
Frequently asked questions
What is potassium dichromate commonly used for?
Potassium dichromate is primarily used as an oxidizing agent in laboratories, for chrome plating, cleaning solutions, and as a reagent in analytical chemistry.
What is the chemical formula and molecular weight of potassium dichromate?
The chemical formula is **K₂Cr₂O₇**, and the molecular weight is **294.18 g/mol**.
What safety classification does potassium dichromate have?
Potassium dichromate is classified with the **Signal Word 'Danger'** due to its high toxicity and oxidizing properties.
How should potassium dichromate be stored?
It should be stored in a **cool, dry place at ambient temperature**, away from flammable materials and incompatible substances.
Does Molekula supply potassium dichromate in bulk quantities?
Yes, Molekula can supply potassium dichromate in bulk, subject to availability and regulatory compliance.
What documentation comes with an order of potassium dichromate?
Each order includes a **Certificate of Analysis (CoA)**, Safety Data Sheet (SDS), and a Material Safety Information document.
Ready to order or need a custom pack?
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