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 · Identifiers
Hydroxylamine ....% [> 55 %… identifiers and molecular data
Hydroxylamine ....% [> 55 %… CAS number and EC number
Hydroxylamine ....% [> 55 %… molecular formula and molecular weight
03 · GHS classification
Hydroxylamine ....% [> 55 %… hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Hydroxylamine ....% [> 55 %… pictograms and signal word
Hydroxylamine ....% [> 55 %… hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Explosives GHS chapter 2.1 | Category Unstable explosive | H200 | GHS01 |
| Corrosive to metals GHS chapter 2.16 | Category 1 | H290 | GHS05 |
| Acute toxicity - oral GHS chapter 3.1 | Category 4 | H302 | GHS07 |
| Acute toxicity - dermal GHS chapter 3.1 | Category 4 | H312 | GHS07 |
| Skin corrosion/irritation GHS chapter 3.2 | Category 2 | H315 | GHS07 |
| Serious eye damage/eye irritation GHS chapter 3.3 | Category 1 | H318 | GHS05 |
| Skin sensitisation GHS chapter 3.4 | Category 1 or 1A or 1B | H317 | GHS07 |
| Carcinogenicity GHS chapter 3.6 | Category 2 | H351 | GHS08 |
| Specific target organ toxicity - single exposure GHS chapter 3.8 | Category 3 | H335 | GHS07 |
| Specific target organ toxicity - repeated exposure GHS chapter 3.9 | Category 2 | H373 | GHS08 |
| Hazardous to the aquatic environment - acute GHS chapter 4.1 | Category 1 | H400 | GHS09 |
Where two values are shown with “or”, the hazard statement is shared by more than one category or by more than one class, and the code alone does not say which. H272, for example, belongs to oxidising liquids and to oxidising solids — the physical state decides. The binding answer for a specific entry is in the CLP Annex VI table itself.
Hydroxylamine ....% [> 55 %… hazard statements (H-codes)
| 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. |
This page lists only the codes assigned to Hydroxylamine ....% [> 55…. The full reference lives on the hazard statements hub, the precautionary statements hub and the GHS pictograms hub.
Safety Data Sheet
Getting an SDS for Hydroxylamine ....% [> 55…
A Safety Data Sheet is written for a product, not for a substance: the supplier of the grade you actually buy issues it, so two suppliers of Hydroxylamine ....%… issue two different sheets. That is why there is no single authoritative SDS for a substance to download — what there is, is the job of collecting the sheets for the products you hold and keeping them current as suppliers revise them.
04 · Precautionary statements
Hydroxylamine ....% [> 55 %… precautionary statements
CLP Annex VI assigns 24 precautionary statements to Hydroxylamine ....% [> 55…. They are grouped the way a label groups them: what to do before handling, what to do when something has already happened, how to store it and how to dispose of it.
Prevention
What to do before and during handling so the hazard never happens.
Response
What to do once exposure, spillage or fire has already happened.
Disposal
What has to happen to the contents and the empty container.
Reading the notation. … is a blank the supplier fills in — not a truncated sentence.· [square brackets] mark a part printed only when it applies.
05 · Names in the regulation
Hydroxylamine ....% [> 55 %… name in 23 EU languages
CLP Annex VI Part 3 is published in every language edition of the regulation, and the identification column is written out in each of them. Nothing below is translated by us: each line is the name as that edition prints it. Under Art. 18(2) the substance name from Annex VI is a lawful product identifier, so this is the wording to put on a label going to that market — and where the cell lists several designations, any one of them qualifies.
| Language | Name in CLP Annex VI Part 3 |
|---|---|
| Bulgarian български | хидроксиламин … % [> 55 % във воден разтвор] |
| Spanish español | Hidroxilamina al … % [> 55 % en solución acuosa] |
| Czech čeština | hydroxylamin .... % [> 55 % ve vodném roztoku] |
| Danish dansk | hydroxylamin ....% [> 55 % i vandig opløsning] |
| German Deutsch | Hydroxylamin … % [> 55 % in wässriger Lösung] |
| Estonian eesti | hüdroksüülamiin … % [> 55 % vesilahuses] |
| Greek ελληνικά | υδροξυλαμίνη … % [> 55 % σε υδατικό διάλυμα] |
| English English | hydroxylamine … % [> 55 % in aqueous solution] |
| French français | hydroxylamine… % [> 55 % en solution aqueuse] |
| Croatian hrvatski | hidroksilamin … % [> 55 % u vodenoj otopini] |
| Italian italiano | idrossilammina …% [> 55 % in soluzione acquosa] |
| Latvian latviešu | hidroksilamīns … % [> 55 % ūdens šķīdumā] |
| Lithuanian lietuvių | hidroksilaminas … % [> 55 % vandeninis tirpalas] |
| Hungarian magyar | hidroxilamin …% [> 55 % vizes oldatban] |
| Maltese Malti | idrossilammina … % [> 55 % f'soluzzjoni milwiema] |
| Dutch Nederlands | hydroxylamine … % [> 55 % in waterige oplossing] |
| Polish polski | hydroksylamina … % [> 55 % w roztworze wodnym] |
| Portuguese português | hidroxilamina a … % [>55 % em solução aquosa] |
| Romanian română | hidroxilamină ....% [> 55 % în soluție apoasă] |
| Slovak slovenčina | hydroxylamín ... % [> 55% vodný roztok] |
| Slovenian slovenščina | hidroksilamin ... % [> 55 % v vodni raztopini] |
| Finnish suomi | hydroksyyliamiini …% [> 55 % vesiliuoksena] |
| Swedish svenska | hydroxylamin … % [> 55 % i vattenlösning] |
The part in square brackets is not an editorial comment. Annex VI Part 1 §1.1.1.4 makes a reference of that kind part of the name itself, which means it has to be printed on the label together with the name.
All 23 language editions of Annex VI carry this entry. Irish is the twenty-fourth official EU language and has no line here for a different reason: no consolidated CLP text has ever been published in Irish, so there is no Irish edition of Annex VI to quote a name from. Source: consolidated CLP, CELEX 02008R1272, language editions. © European Union, https://eur-lex.europa.eu — only the electronic Official Journal of the European Union is authentic.
06 · Label elements
Hydroxylamine ....% [> 55 %… GHS label elements
Everything CLP Annex VI fixes for Hydroxylamine ....% [> 55…, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Danger
Hydroxylamine ....% [> 55 %…
- Unstable explosives.
- May be corrosive to metals.
- Suspected of causing cancer <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>.
- Harmful in contact with skin.
- Harmful if swallowed.
- May cause respiratory irritation.
- 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>.
- Causes skin irritation.
- Causes serious eye damage.
- May cause an allergic skin reaction.
- Very toxic to aquatic life.
- Obtain special instructions before use.
- Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
- Do not breathe dust/fume/gas/mist/vapours/spray.
- Avoid breathing dust/fume/gas/mist/vapours/spray.
- Wash … thoroughly after handling.
- Do not eat, drink or smoke when using this product.
- Contaminated work clothing should not be allowed out of the workplace.
- Avoid release to the environment.
- Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/…
- IF SWALLOWED:
- IF ON SKIN:
- IF IN EYES:
- IF exposed or concerned:
- Immediately call a POISON CENTER/doctor/…
- Call a POISON CENTER/doctor/… if you feel unwell.
- Get medical advice/attention.
- Get medical advice/attention if you feel unwell.
- Rinse mouth.
- If skin irritation occurs:
- If skin irritation or rash occurs:
- Remove contact lenses, if present and easy to do. Continue rinsing.
- Wash with plenty of water/…
- Collect spillage.
- Dispose of contents/container to …
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open Hydroxylamine ....% [> 55… in the GHS label constructor →
07 · Health hazards
Hydroxylamine ....% [> 55 %… health hazards and exposure limits
Hydroxylamine ....% [> 55 %… hazard summary
Crystals cause first degree burns on short exposure. [CHRIS] Reported toxic effects in humans include methemoglobinemia and skin sensitization. [HSDB] Allergic contact dermatitis reported in workers developing color photographs and handling laboratory reagents; [Kanerva, p. 1803] A skin and respiratory tract irritant; Corrosive to eyes; Can induce methemoglobinemia and consequent anemia; May cause skin sensitization; [ICSC] Occupational asthma confirmed in 2 workers exposed in paper recycling (de-inking process); [Malo] Reacts with water forming corrosive liquids; Rapidly decomposed at room temperature and by hot water; A strong reducing agent; Highly irritating or corrosive to skin and eyes; Reports of methemoglobinemia; [CAMEO] An irritant; May cause skin sensitization; Harmful by ingestion; High doses may cause methemoglobinemia; [Aldrich MSDS]
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
08 · 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.
Hydroxylamine ....% [> 55 %… boiling point
| 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 |
Hydroxylamine ....% [> 55 %… melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | 33 °C (91.4 °F) | HSDB | |
| 33.05 °C (91.5 °F) | CAMEO |
Hydroxylamine ....% [> 55 %… density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 1.227 g/cm³ | HSDB | |
| 1.2 g/cm³ | ICSC | ||
| 1.227 g/cm³ | at 20 °C | CAMEO |
Hydroxylamine ....% [> 55 %… solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| 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 |
Hydroxylamine ....% [> 55 %… vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 10.5009 mmHg | at 20 °C | ICSC |
| 53 mmHg | at 32 °C | HSDB |
Hydroxylamine ....% [> 55 %… flash point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Flash point | 129.44 °C (265 °F) | CAMEO | |
| 129 °C (264.2 °F) | ICSC |
Hydroxylamine ....% [> 55 %… autoignition temperature
| Property | Value | Conditions | Source |
|---|---|---|---|
| Autoignition temperature | 129.44 °C (265 °F) | CAMEO | |
| 215 °C (419 °F) | ICSC |
Hydroxylamine ....% [> 55 %… lower explosive limit (LEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| 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 |
Hydroxylamine ....% [> 55 %… vapor density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor density | 1.1 (air = 1) | ICSC |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Fire and explosion
Hydroxylamine ....% [> 55… fire and explosion behaviour
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.
Hydroxylamine ....% [> 55 %… fire potential
Dangerous fire hazard when exposed to heat, flame, and oxidizers. May ignite spontaneously in air if a large surface area is exposed (e.g. precipitate on paper).
Source: Hazardous Substances Data Bank (HSDB)
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
10 · Handling and storage
Hydroxylamine ....% [> 55 %… storage and handling
Hydroxylamine ....% [> 55 %… safe storage
Fireproof. Separated from incompatible materials. See Chemical Dangers. Cool. Dry. Well closed. Store in an area without drain or sewer access. Provision to contain effluent from fire extinguishing.
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
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)
Hydroxylamine ....% [> 55 %… 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 →
11 · Questions
Hydroxylamine ....% [> 55 %… — frequently asked questions
What is the CAS number of Hydroxylamine ....% [> 55 %…?
The CAS number of Hydroxylamine ....% [> 55 %… is 7803-49-8. Its EC number is 232-259-2.
What is the chemical formula of Hydroxylamine ....% [> 55 %…?
The molecular formula of Hydroxylamine ....% [> 55 %… is H3NO and its molecular weight is 33.03 g/mol.
What does a Hydroxylamine ....% [> 55 %… label have to show?
Under CLP Annex VI the label for Hydroxylamine ....% [> 55 %… carries the pictograms Exploding bomb, Corrosion, Health hazard, Exclamation mark and Environment and the signal word is Danger.
Is Hydroxylamine ....% [> 55 %… flammable?
CLP Annex VI assigns Hydroxylamine ....% [> 55 %… no flammability hazard class. That is not a statement that it cannot burn: the harmonised list only records the hazards that were assessed for it. The flash point reported for it is 129.44 °C (265 °F) (CAMEO).
Is Hydroxylamine ....% [> 55 %… a carcinogen?
CLP Annex VI assigns Hydroxylamine ....% [> 55 %… H351 — suspected of causing cancer. That is category 2: the evidence points that way but is not conclusive.
What is the boiling point of Hydroxylamine ....% [> 55 %…?
The boiling point reported for Hydroxylamine ....% [> 55 %… is 56.5 °C (133.7 °F) (CAMEO).
What is the melting point of Hydroxylamine ....% [> 55 %…?
The melting point reported for Hydroxylamine ....% [> 55 %… is 33 °C (91.4 °F) (HSDB).
How should Hydroxylamine ....% [> 55 %… be stored?
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. (Hazardous Substances Data Bank (HSDB))
Nearby
Substances next to Hydroxylamine ....% [> 55…
Keep going: substances starting with H, or search the whole database by name, CAS number, pictogram or signal word.