Substance profile
Sodium Dichromate
Sodium Dichromate is light-brown to orange-red plates which are strongly hygroscopic and is odorless.
01 · Identification
What Sodium Dichromate is
Sodium Dichromate is light-brown to orange-red plates which are strongly hygroscopic and is odorless. It boils at 400 °C, melts at 357 °C.
Under the GHS it carries the signal word Danger. It is classed as carcinogens.
02 · GHS classification
Hazards and label elements
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
| Code | Hazard statement |
|---|---|
| H272 | May intensify fire; oxidiser. |
| H350 | May cause cancer <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>. |
| H340 | May cause genetic defects <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>. |
| H360FD | May damage fertility. May damage the unborn child. |
| H330 | Fatal if inhaled. |
| H301 | Toxic if swallowed. |
| H312 | Harmful in contact with skin. |
| H372 | Causes damage to organs <or state all organs affected, if known> through prolonged or repeated exposure <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>. |
| H314 | Causes severe skin burns and eye damage. |
| H334 | May cause allergy or asthma symptoms or breathing difficulties if inhaled. |
| H317 | May cause an allergic skin reaction. |
| H400 | Very toxic to aquatic life. |
| H410 | Very toxic to aquatic life with long lasting effects. |
Precautionary statements: P201, P260, P261, P270, P271, P272, P273, P280, P301, P302, P304, P308, P310, P312, P313, P314, P330, P331, P333, P352, P391, P501
03 · Physical and chemical properties
Sodium Dichromate properties
Every value is shown with the conditions it was measured under and the source it came from. Where sources disagree, all values are listed rather than one being picked — the difference is usually a different form of the substance, not an error.
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 400 °C (752 °F) | decomposes, decomposes | HSDB |
| Melting point | 356.7 °C (674.1 °F) | HSDB | |
| 357.22 °C (675 °F) | CAMEO | ||
| 357 °C (674.6 °F) | ICSC | ||
| Density | 1 g/cm³ | HSDB | |
| 2.35 g/cm³ | Sodium chromate dihydrate | HSDB | |
| 2.35 g/cm³ | at 25 °C | CAMEO | |
| Solubility | Solubility in water, g/100ml at 20 °C: 236 (very good) | at 20 °C | ICSC |
| 513.2 g/L methanol at 19.4 °C | at 19.4 °C | HSDB | |
| In water, 187 g/100 g water at 25 °C | at 25 °C | HSDB | |
| Autoignition temperature | Not flammable (USCG, 1999) | CAMEO | |
| Corrosivity | Corrosive because of oxidizing potency. | Chromate salts | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling Sodium Dichromate
Storage conditions
Keep container tightly closed in a dry and well-ventilated place. Storage class (TRGS 510): Oxidizing hazardous materials /Sodium Dichromate Dihydrate/
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
Incompatible materials: Strong reducing agents, alcohols. /Sodium Dichromate Dihydrate/
Source: Hazardous Substances Data Bank (HSDB)
Planning storage for a mix of chemicals? Check Sodium Dichromate in the storage compatibility matrix →