Substance profile
Hydroxylamine ....% [> 55 % in aqueous solution]
Hydroxylamine ....% [> 55 % in aqueous solution] is colorless cyrstals.
01 · Identification
What Hydroxylamine ....% [> 55 %… is
Hydroxylamine ....% [> 55 % in aqueous solution] is colorless cyrstals. Its molecular formula is H3NO and its molecular weight is 33.03 g/mol. It boils at 56.5 °C, melts at 33 °C, is soluble in water.
Under the GHS it carries the signal word Danger. It is classed as reactive agents - 3rd degree.
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 |
|---|---|
| H200 | Unstable explosives. |
| H290 | May be corrosive to metals. |
| H351 | Suspected of causing cancer <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>. |
| H312 | Harmful in contact with skin. |
| H302 | Harmful if swallowed. |
| H335 | May cause respiratory irritation. |
| H373 | May cause 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>. |
| H315 | Causes skin irritation. |
| H318 | Causes serious eye damage. |
| H317 | May cause an allergic skin reaction. |
| H400 | Very toxic to aquatic life. |
Precautionary statements: P201, P210, P260, P261, P264, P270, P272, P273, P280, P301, P302, P305, P308, P310, P312, P313, P314, P330, P332, P333, P338, P352, P391, P501
03 · Physical and chemical properties
Hydroxylamine ....% [> 55 %… 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 | 56.5 °C (133.7 °F) | CAMEO | |
| 107 °C (224.6 °F) | ICSC | ||
| 58 °C (136.4 °F) | at 760 mmHg | DOE PAC | |
| Melting point | 33 °C (91.4 °F) | HSDB | |
| 33.05 °C (91.5 °F) | CAMEO | ||
| Density | 1.227 g/cm³ | HSDB | |
| 1.2 g/cm³ | ICSC | ||
| 1.227 g/cm³ | at 20 °C | CAMEO | |
| Solubility | Very sol in water, liq ammonia, methanol; sparingly sol in ether, benzene, carbon disulfide, chloroform | HSDB | |
| Soluble in alcohol, acids, and cold water | HSDB | ||
| Solubility in water at 20 °C: freely soluble | at 20 °C | ICSC | |
| Vapor pressure | 10.5009 mmHg | at 20 °C | ICSC |
| 53 mmHg | at 32 °C | HSDB | |
| Flash point | 129.44 °C (265 °F) | CAMEO | |
| 129 °C (264.2 °F) | ICSC | ||
| Autoignition temperature | 129.44 °C (265 °F) | CAMEO | |
| 215 °C (419 °F) | ICSC | ||
| Lower explosive limit (LEL) | Noncombustible solid that explodes when heated to 265 °F (129 °C). ... It will decompose at high temperatures and, if confined at 284 °F (140 °C), will explode. | decomposes, at 140 °C | HSDB |
| Vapor density | 1.1 (air = 1) | ICSC |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Fire and explosion
Fire and explosion behaviour of Hydroxylamine ....% [> 55…
These are descriptions rather than measured values, so they are kept out of the table above and quoted here with the source that reported them.
Fire and explosion
Explosive reaction with potassium dichromate; chromium trioxide; powdered zinc + heat. Forms the heat sensitive explosive bis(hydroxylamide) in reaction with zinc or calcium.
Source: HSDB
05 · Handling and storage
Storing and handling Hydroxylamine ....% [> 55 %…
Storage conditions
Separate from oxidizing materials. store in a cool, dry, well-ventilated location. store away from heat, oxidizers, and sunlight. Outside or detached storage is preferred.
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
Incompatible with carbonyls; pyridine. Vigorous reaction with hypochlorites.
Source: Hazardous Substances Data Bank (HSDB)
Planning storage for a mix of chemicals? Check Hydroxylamine ....% [>… in the storage compatibility matrix →