Substance profile
1,5-naphthylene diisocyanate [containing < 0.1 % (w/w) of particles with an aerodynamic diameter of below 50 µm]
1,5-naphthylene diisocyanate [containing < 0.1 % (w/w) of particles with an aerodynamic diameter of below 50 µm]: 1,5-naphthalene diisocyanate is a white to light-yellow crystalline flakes.
01 · Identification
What 1,5-naphthylene diisocyanate… is
1,5-naphthylene diisocyanate [containing < 0.1 % (w/w) of particles with an aerodynamic diameter of below 50 µm]: 1,5-naphthalene diisocyanate is a white to light-yellow crystalline flakes. Its molecular formula is C12H6N2O2 and its molecular weight is 210.19 g/mol. It boils at 263 °C, melts at 127 °C.
Under the GHS it carries the signal word Danger.
02 · Identifiers
1,5-naphthylene diisocyanate… identifiers and molecular data
1,5-naphthylene diisocyanate… CAS number and EC number
1,5-naphthylene diisocyanate… molecular formula and molecular weight
Other names for 1,5-naphthylene diisocyanate…
- 1,5-naphthylene diisocyanate
- [containing < 0.1 % (w/w) of particles with an aerodynamic diameter of below 50 µm]
03 · GHS classification
1,5-naphthylene diisocyanate… hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
1,5-naphthylene diisocyanate… pictograms and signal word
1,5-naphthylene diisocyanate… hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Skin corrosion/irritation GHS chapter 3.2 | Category 2 | H315 | GHS07 |
| Serious eye damage/eye irritation GHS chapter 3.3 | Category 2A | H319 | GHS07 |
| Respiratory sensitisation GHS chapter 3.4 | Category 1 or 1A or 1B | H334 | GHS08 |
| Skin sensitisation GHS chapter 3.4 | Category 1 or 1A or 1B | H317 | GHS07 |
| Specific target organ toxicity - single exposure GHS chapter 3.8 | Category 3 | H335 | GHS07 |
| Hazardous to the aquatic environment - chronic GHS chapter 4.1 | Category 3 | H412 | — |
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.
1,5-naphthylene diisocyanate… hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H335 | May cause respiratory irritation. |
| H315 | Causes skin irritation. |
| H319 | Causes serious eye irritation. |
| H334 | May cause allergy or asthma symptoms or breathing difficulties if inhaled. |
| H317 | May cause an allergic skin reaction. |
| H412 | Harmful to aquatic life with long lasting effects. |
This page lists only the codes assigned to 1,5-naphthylene diisocyana…. 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 1,5-naphthylene diisocyana…
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 1,5-naphthylene… 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
1,5-naphthylene diisocyanate… precautionary statements
CLP Annex VI assigns 14 precautionary statements to 1,5-naphthylene diisocyana…. 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
1,5-naphthylene diisocyanate… 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 | 1,5-нафтилендиизоцианат |
| Spanish español | Diisocianato de 1,5-naftileno |
| Czech čeština | 1,5-diisokyanatonaftalen |
| Danish dansk | 1,5-naphthylendiisocyanat |
| German Deutsch | 1,5-Naphthylendiisocyanat |
| Estonian eesti | 1,5-naftüleendiisotsüanaat |
| Greek ελληνικά | 1,5-διισοκυανοναφθαλίνιο |
| English English | 1,5-naphthylene diisocyanate |
| French français | diisocyanate de 1,5-naphtylène |
| Croatian hrvatski | 1,5-naftilen diizocijanat |
| Italian italiano | 1,5-naftilene diisocianato |
| Latvian latviešu | 1,5-naftalēna diizocianāts |
| Lithuanian lietuvių | 1,5-naftilendiizocianatas |
| Hungarian magyar | 1,5-naftilén-diizocianát |
| Maltese Malti | 1,5-naftilen diisoċjanat |
| Dutch Nederlands | 1,5-naftyleendiisocyanaat |
| Polish polski | diizocyjanian 1,5-naftalenu |
| Portuguese português | di-isocianato de 1,5-naftileno |
| Romanian română | diizocianat de 1,5-naftilen |
| Slovak slovenčina | diizocianat de 1,5-naftilen |
| Slovenian slovenščina | 1,5-naftilen diizocianat |
| Finnish suomi | 1,5-naftaleenidi-isosyanaatti |
| Swedish svenska | 1,5-naftylendiisocyanat |
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
1,5-naphthylene diisocyanate… GHS label elements
Everything CLP Annex VI fixes for 1,5-naphthylene diisocyana…, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Danger
1,5-naphthylene diisocyanate…
- May cause respiratory irritation.
- Causes skin irritation.
- Causes serious eye irritation.
- May cause allergy or asthma symptoms or breathing difficulties if inhaled.
- May cause an allergic skin reaction.
- Harmful to aquatic life with long lasting effects.
- Avoid breathing dust/fume/gas/mist/vapours/spray.
- Wash … thoroughly after handling.
- 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 ON SKIN:
- IF IN EYES:
- Get medical advice/attention.
- If skin irritation occurs:
- If skin irritation or rash occurs:
- If eye irritation persists:
- Remove contact lenses, if present and easy to do. Continue rinsing.
- Wash with plenty of water/…
- Dispose of contents/container to …
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open 1,5-naphthylene diisocyana… in the GHS label constructor →
07 · Health hazards
1,5-naphthylene diisocyanate… health hazards and exposure limits
1,5-naphthylene diisocyanate… hazard summary
May cause skin sensitization; [ICSC] Biological monitoring of exposure to 1,5-naphthalene diisocyanate and 4,4'-methylenediphenyl diisocyanate. [PMID 16506043] See DIISOCYANATES.
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
1,5-naphthylene diisocyanate… carcinogenicity classification
An IARC group and a CLP classification answer different questions. IARC judges whether the evidence for cancer in humans is strong enough; CLP Annex VI is the legally binding EU classification. A substance can carry one and not the other.
1,5-naphthylene diisocyanate… occupational exposure limits
| Limit | Value | Source |
|---|---|---|
| PEL | none | The National Institute for Occupational Safety and Health (NIOSH) |
| REL | 0.005 ppm (0.040 mg/m³) | Occupational Safety and Health Administration (OSHA) |
| REL | 0.020 ppm (0.170 mg/m³) [10 minutes] | Occupational Safety and Health Administration (OSHA) |
| REL | TWA 0.040 mg/m3 (0.005 ppm) C 0.170 mg/m3 (0.020 ppm) [10-minute] | The National Institute for Occupational Safety and Health (NIOSH) |
| IDLH | N.D. | The National Institute for Occupational Safety and Health (NIOSH) |
These are United States values. The European Union sets its own indicative and binding limits, and the figure that applies at a given workplace is the one in the local regulation — not the one shown here.
08 · Physical and chemical properties
1,5-naphthylene diisocyanate… 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.
1,5-naphthylene diisocyanate… boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 262.78 °C (505 °F) | NIOSH | |
| 262.78 °C (505 °F) | at 760 mmHg | CAMEO |
1,5-naphthylene diisocyanate… melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | 127.22 °C (261 °F) | NIOSH | |
| 130 °C (266 °F) | ICSC |
1,5-naphthylene diisocyanate… density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 1.42 g/cm³ | ICSC |
1,5-naphthylene diisocyanate… vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 0.003 mmHg | OSHA | |
| 0.003 mmHg | at 23.89 °C | NIOSH |
1,5-naphthylene diisocyanate… flash point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Flash point | 155 °C (311 °F) | NIOSH | |
| 192 °C (377.6 °F) | ICSC |
1,5-naphthylene diisocyanate… lower explosive limit (LEL)
| Property | Value | Conditions | Source |
|---|---|---|---|
| Lower explosive limit (LEL) | Combustible Solid | NIOSH |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Handling and storage
1,5-naphthylene diisocyanate… storage and handling
1,5-naphthylene diisocyanate… incompatible materials
None reported
Source: The National Institute for Occupational Safety and Health (NIOSH)
1,5-naphthylene diisocyanate… reactivity
Isocyanates and thioisocyanates, such as 1,5-NAPHTHALENE DIISOCYANATE, are incompatible with many classes of compounds, reacting exothermically to release toxic gases. Reactions with amines, aldehydes, alcohols, alkali metals, ketones, mercaptans, strong oxidizers, hydrides, phenols, and peroxides can cause vigorous releases of heat. Acids and bases initiate polymerization reactions in these materials. Some isocyanates react with water to form amines and liberate carbon dioxide. Base-catalysed reactions of isocyanates with alcohols should be carried out in inert solvents. Such reactions in the absence of solvents often occur with explosive violence, [Wischmeyer(1969)].
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check 1,5-naphthylene diisocyan… in the storage compatibility matrix →
10 · Questions
1,5-naphthylene diisocyanate… — frequently asked questions
What is the CAS number of 1,5-naphthylene diisocyanate…?
The CAS number of 1,5-naphthylene diisocyanate… is 3173-72-6. Its EC number is 221-641-4.
What is the chemical formula of 1,5-naphthylene diisocyanate…?
The molecular formula of 1,5-naphthylene diisocyanate… is C12H6N2O2 and its molecular weight is 210.19 g/mol.
What does a 1,5-naphthylene diisocyanate… label have to show?
Under CLP Annex VI the label for 1,5-naphthylene diisocyanate… carries the pictograms Exclamation mark and Health hazard and the signal word is Danger.
Is 1,5-naphthylene diisocyanate… flammable?
CLP Annex VI assigns 1,5-naphthylene diisocyanate… 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 155 °C (311 °F) (NIOSH).
Is 1,5-naphthylene diisocyanate… a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for 1,5-naphthylene diisocyanate…. Annex VI is a list of agreed classifications, not a list of substances found safe, so this is an absence of a classification rather than a clean bill of health. IARC places it in Group 3: not classifiable as to its carcinogenicity to humans.
What is the exposure limit for 1,5-naphthylene diisocyanate…?
The US occupational exposure limit reported for 1,5-naphthylene diisocyanate… is none (The National Institute for Occupational Safety and Health (NIOSH)). Limits differ by country: the EU sets its own indicative and binding values, and the figure that applies at a given workplace is the one in the local regulation.
What is the boiling point of 1,5-naphthylene diisocyanate…?
The boiling point reported for 1,5-naphthylene diisocyanate… is 262.78 °C (505 °F) (NIOSH).
What is the melting point of 1,5-naphthylene diisocyanate…?
The melting point reported for 1,5-naphthylene diisocyanate… is 127.22 °C (261 °F) (NIOSH).
Nearby
Substances next to 1,5-naphthylene diisocyana…
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