Ammonium chromate
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| Names | ||||
|---|---|---|---|---|
| Other names
Ammonium chromate(IV)
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| Identifiers | ||||
| ChemSpider | ||||
| ECHA InfoCard | 100.029.217 | |||
CompTox Dashboard (EPA)
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| Properties | ||||
| (NH4)2CrO4 | ||||
| Molar mass | 152.07 g/mol | |||
| Appearance | yellow crystals | |||
| Density | 1.90 g/ml | |||
| Melting point | 185 °C (365 °F; 458 K) decomposes[1] | |||
| 24.8 g/100ml (0 °C) 37.36 g/100ml (25 °C)[1] 45.3 g/100ml (40 °C) 70.06 g/100ml (75 °C)[1][2] | ||||
| Thermochemistry | ||||
Std molar
entropy (S⦵298) |
657 J/K·mol | |||
Std enthalpy of
formation (ΔfH⦵298) |
-1163 kJ/mol | |||
| Hazards | ||||
| Occupational safety and health (OHS/OSH): | ||||
Main hazards
|
Toxic | |||
| GHS labelling: | ||||
| class="wikitable collapsible" style="min-width: 50em;" | ||||
| Pictogram | Code | Symbol description | Image link | |
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GHS01 | {{GHS exploding bomb}} | Image:GHS-pictogram-explos.svg | Explosive |
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GHS02 | {{GHS flame}} | Image:GHS-pictogram-flamme.svg | |
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GHS03 | {{GHS flame over circle}} | Image:GHS-pictogram-rondflam.svg | |
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GHS04 | {{GHS gas cylinder}} | Image:GHS-pictogram-bottle.svg | |
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GHS05 | {{GHS corrosion}} | Image:GHS-pictogram-acid.svg | Corrosive |
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GHS06 | {{GHS skull and crossbones}} | Image:GHS-pictogram-skull.svg | Accute Toxic |
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GHS07 | {{GHS exclamation mark}} | Image:GHS-pictogram-exclam.svg | Irritant |
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GHS08 | {{GHS health hazard}} | Image:GHS-pictogram-silhouette.svg | Health Hazard |
 |
GHS09 | {{GHS environment}} | Image:GHS-pictogram-pollu.svg | Environment |
See also
- {{H-phrases}}
- {{P-phrases}}
- Category:GHS templates
| Pictogram | Code | Symbol description | Image link | |
|---|---|---|---|---|
|
GHS01 | {{GHS exploding bomb}} | Image:GHS-pictogram-explos.svg | Explosive |
|
GHS02 | {{GHS flame}} | Image:GHS-pictogram-flamme.svg | |
|
GHS03 | {{GHS flame over circle}} | Image:GHS-pictogram-rondflam.svg | |
|
GHS04 | {{GHS gas cylinder}} | Image:GHS-pictogram-bottle.svg | |
|
GHS05 | {{GHS corrosion}} | Image:GHS-pictogram-acid.svg | Corrosive |
|
GHS06 | {{GHS skull and crossbones}} | Image:GHS-pictogram-skull.svg | Accute Toxic |
|
GHS07 | {{GHS exclamation mark}} | Image:GHS-pictogram-exclam.svg | Irritant |
|
GHS08 | {{GHS health hazard}} | Image:GHS-pictogram-silhouette.svg | Health Hazard |
|
GHS09 | {{GHS environment}} | Image:GHS-pictogram-pollu.svg | Environment |
See also
- {{H-phrases}}
- {{P-phrases}}
- Category:GHS templates
| Pictogram | Code | Symbol description | Image link | |
|---|---|---|---|---|
|
GHS01 | {{GHS exploding bomb}} | Image:GHS-pictogram-explos.svg | Explosive |
|
GHS02 | {{GHS flame}} | Image:GHS-pictogram-flamme.svg | |
|
GHS03 | {{GHS flame over circle}} | Image:GHS-pictogram-rondflam.svg | |
|
GHS04 | {{GHS gas cylinder}} | Image:GHS-pictogram-bottle.svg | |
|
GHS05 | {{GHS corrosion}} | Image:GHS-pictogram-acid.svg | Corrosive |
|
GHS06 | {{GHS skull and crossbones}} | Image:GHS-pictogram-skull.svg | Accute Toxic |
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GHS07 | {{GHS exclamation mark}} | Image:GHS-pictogram-exclam.svg | Irritant |
|
GHS08 | {{GHS health hazard}} | Image:GHS-pictogram-silhouette.svg | Health Hazard |
|
GHS09 | {{GHS environment}} | Image:GHS-pictogram-pollu.svg | Environment |
See also
- {{H-phrases}}
- {{P-phrases}}
- Category:GHS templates
| Pictogram | Code | Symbol description | Image link | |
|---|---|---|---|---|
|
GHS01 | {{GHS exploding bomb}} | Image:GHS-pictogram-explos.svg | Explosive |
|
GHS02 | {{GHS flame}} | Image:GHS-pictogram-flamme.svg | |
|
GHS03 | {{GHS flame over circle}} | Image:GHS-pictogram-rondflam.svg | |
|
GHS04 | {{GHS gas cylinder}} | Image:GHS-pictogram-bottle.svg | |
|
GHS05 | {{GHS corrosion}} | Image:GHS-pictogram-acid.svg | Corrosive |
|
GHS06 | {{GHS skull and crossbones}} | Image:GHS-pictogram-skull.svg | Accute Toxic |
|
GHS07 | {{GHS exclamation mark}} | Image:GHS-pictogram-exclam.svg | Irritant |
|
GHS08 | {{GHS health hazard}} | Image:GHS-pictogram-silhouette.svg | Health Hazard |
|
GHS09 | {{GHS environment}} | Image:GHS-pictogram-pollu.svg | Environment |
See also
|-
|-
| style="padding-left:1em;" |
| Danger
|-
|-
| style="padding-left:1em;" |
| H272, H314, H334, H350, H400[4]
|-
|-
| style="padding-left:1em;" |
| P201, P220, P261, P273, P280, P305+P351+P338[4]
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| colspan=2 style="text-align:left; background:#f8eaba; border:1px solid #a2a9b1;" |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Ammonium chromate is a salt with the formula (NH4)2CrO4. It forms yellow, monoclinic crystals; made from ammonium hydroxide and ammonium dichromate; used in photography as a sensitizer for gelatin coatings. It's often used in photography, textile printing, and fixing chromate dyes on wool. It is also used as an analytical reagent, catalyst, and corrosion inhibitor. It is soluble in water, and, when applied, can cause irritation in the mucous membrane, eyes, respiratory tract, skin, etc. It may cause skin sensitization after prolonged contact. It is also known to be carcinogenic (cancer-causing), and it can cause tissue ulceration and injury to the liver and kidneys.[5]
See also
References
- ^ a b c Perry, Dale L. (2011). Handbook of Inorganic Compounds, Second Edition. Boca Raton, Florida: CRC Press. ISBN 978-1-43981462-8. Retrieved 2014-04-28.
- ^ http://chemister.ru/Database/properties-en.php?dbid=1&id=6481
- ^ a b c d "Globally Harmonized System of Classification and Labelling of Chemicals" (pdf). 2021. Annex 3: Codification of Statements and Pictograms (pp 268–385).
- ^ a b c Sigma-Aldrich Co., Ammonium chromate. Retrieved on 28-04-2014.
- ^ Information preview for Ammonium chromate, GIDEON