Potassium dichromate

1. Molecular Structure

2. Chemical Identity

Property	Value
IUPAC Name	dipotassium;oxido-(oxido(dioxo)chromio)oxy-dioxochromium
Molecular Formula	Cr₂K₂O₇
SMILES	`[O-][Cr](=O)(=O)O[Cr](=O)(=O)[O-].[K+].[K+]`

3. Chemical Properties

Property	Value
Molecular Weight	294.18 g/mol
TPSA	124 Å²
LogP	N/A
Formal Charge	0

4. Experimental Properties

Property	Value
Boiling Point	Decomposes at about 500 °C
Melting Point	398 °C
Density	2.676 at 25 °C/4 °C
Solubility	In water, 45,000 mg/L at 25 °C
Flash Point	No data available
Autoignition Temp	Not flammable (USCG, 1999)

5. Supplier Suggestions

Supplier	Website	Location
Sigma Aldrich/Merck	Visit Merck	International
Lennox	Visit Lennox	Ireland
Doc Solder	Visit Doc Solder	Ireland

6. GHS Safety & Hazards

Signal Word
Danger

Hazard Statements

H272 (92.3%): May intensify fire; oxidizer [Danger Oxidizing liquids; Oxidizing solids]
H272: May intensify fire; oxidizer [Danger Oxidizing liquids; Oxidizing solids]
H300: Fatal if swallowed [Danger Acute toxicity, oral]
H301 (98.6%): Toxic if swallowed [Danger Acute toxicity, oral]
H301: Toxic if swallowed [Danger Acute toxicity, oral]
H310: Fatal in contact with skin [Danger Acute toxicity, dermal]
H311: Toxic in contact with skin [Danger Acute toxicity, dermal]
H312 (91%): Harmful in contact with skin [Warning Acute toxicity, dermal]
H312: Harmful in contact with skin [Warning Acute toxicity, dermal]
H314 (99.8%): Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]
H314: Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]
H317 (98.6%): May cause an allergic skin reaction [Warning Sensitization, Skin]
H317: May cause an allergic skin reaction [Warning Sensitization, Skin]
H318 (33.2%): Causes serious eye damage [Danger Serious eye damage/eye irritation]
H318: Causes serious eye damage [Danger Serious eye damage/eye irritation]
H330 (99.8%): Fatal if inhaled [Danger Acute toxicity, inhalation]
H330: Fatal if inhaled [Danger Acute toxicity, inhalation]
H334 (99.8%): May cause allergy or asthma symptoms or breathing difficulties if inhaled [Danger Sensitization, respiratory]
H334: May cause allergy or asthma symptoms or breathing difficulties if inhaled [Danger Sensitization, respiratory]
H340 (99.8%): May cause genetic defects [Danger Germ cell mutagenicity]
H340: May cause genetic defects [Danger Germ cell mutagenicity]
H350 (99.8%): May cause cancer [Danger Carcinogenicity]
H350: May cause cancer [Danger Carcinogenicity]
H360 (78.4%): May damage fertility or the unborn child [Danger Reproductive toxicity]
H360: May damage fertility or the unborn child [Danger Reproductive toxicity]
H360FD (21.4%): May damage fertility; May damage the unborn child [Danger Reproductive toxicity]
H360FD: May damage fertility; May damage the unborn child [Danger Reproductive toxicity]
H370: Causes damage to organs [Danger Specific target organ toxicity, single exposure]
H372 (91%): Causes damage to organs through prolonged or repeated exposure [Danger Specific target organ toxicity, repeated exposure]
H372 **: Causes damage to organs through prolonged or repeated exposure [Danger Specific target organ toxicity, repeated exposure]
H372: Causes damage to organs through prolonged or repeated exposure [Danger Specific target organ toxicity, repeated exposure]
H400 (99.6%): Very toxic to aquatic life [Warning Hazardous to the aquatic environment, acute hazard]
H400: Very toxic to aquatic life [Warning Hazardous to the aquatic environment, acute hazard]
H410 (99.8%): Very toxic to aquatic life with long lasting effects [Warning Hazardous to the aquatic environment, long-term hazard]
H410: Very toxic to aquatic life with long lasting effects [Warning Hazardous to the aquatic environment, long-term hazard]

Precautionary Statements

P203, P210, P220, P233, P260, P261, P264, P264+P265, P270, P271, P272, P273, P280, P284, P301+P316, P301+P330+P331, P302+P352, P302+P361+P354, P304+P340, P305+P354+P338, P316, P317, P318, P319, P320, P321, P330, P333+P317, P342+P316, P362+P364, P363, P370+P378, P391, P403, P403+P233, P405, and P501 (click each P-code to see the statement)
P203, P210, P220, P233, P260, P261, P264, P270, P271, P272, P273, P280, P284, P301+P316, P301+P330+P331, P302+P352, P302+P361+P354, P304+P340, P305+P354+P338, P316, P317, P318, P319, P320, P321, P330, P333+P317, P342+P316, P362+P364, P363, P370+P378, P391, P403, P403+P233, P405, and P501 (click each P-code to see the statement)
P203, P210, P220, P233, P260, P262, P264, P264+P265, P270, P271, P273, P280, P284, P301+P316, P301+P330+P331, P302+P352, P302+P361+P354, P304+P340, P305+P354+P338, P316, P317, P318, P319, P320, P321, P330, P342+P316, P361+P364, P363, P370+P378, P391, P403, P403+P233, P405, and P501 (click each P-code to see the statement)
P203, P233, P260, P261, P262, P264, P264+P265, P270, P271, P272, P273, P280, P284, P301+P316, P301+P330+P331, P302+P352, P302+P361+P354, P304+P340, P305+P354+P338, P308+P316, P316, P317, P318, P319, P320, P321, P330, P333+P317, P342+P316, P361+P364, P362+P364, P363, P391, P403, P403+P233, P405, and P501 (click each P-code to see the statement)
P203, P233, P260, P261, P264, P264+P265, P270, P271, P272, P280, P284, P301+P316, P301+P330+P331, P302+P352, P302+P361+P354, P304+P340, P305+P354+P338, P308+P316, P316, P317, P318, P319, P320, P321, P330, P333+P317, P342+P316, P362+P364, P363, P403, P403+P233, P405, and P501 (click each P-code to see the statement)