Substance profile
Benzo[rst]pentaphene
Benzo[rst]pentaphene is greenish-yellow needles, prisms or lamellae.
01 · Identification
What Benzo[rst]pentaphene is
Benzo[rst]pentaphene is greenish-yellow needles, prisms or lamellae. Its molecular formula is C24H14 and its molecular weight is 302.4 g/mol. It melts at 284 °C.
Under the GHS it carries the signal word Danger. It is classed as carcinogens.
02 · Identifiers
Benzo[rst]pentaphene identifiers and molecular data
Benzo[rst]pentaphene CAS number and EC number
Benzo[rst]pentaphene molecular formula and molecular weight
03 · GHS classification
Benzo[rst]pentaphene hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Benzo[rst]pentaphene pictograms and signal word
Benzo[rst]pentaphene hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Germ cell mutagenicity GHS chapter 3.5 | Category 2 | H341 | GHS08 |
| Carcinogenicity GHS chapter 3.6 | Category 1A or 1B | H350 | GHS08 |
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.
Benzo[rst]pentaphene hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H350 | May cause cancer <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>. |
| H341 | Suspected of causing genetic defects <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>. |
This page lists only the codes assigned to Benzo[rst]pentaphene. 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 Benzo[rst]pentaphene
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 Benzo[rst]pentaphene 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
Benzo[rst]pentaphene precautionary statements
CLP Annex VI assigns 4 precautionary statements to Benzo[rst]pentaphene. 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.
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
Benzo[rst]pentaphene 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 | бензо[ rst ]пентафен |
| Spanish español | Benzo[rst]pentafeno |
| Czech čeština | benzo[ rst ]pentafen |
| Danish dansk | benzo[ rst ]pentaphen |
| German Deutsch | Benzo[ rst ]pentaphen |
| Estonian eesti | benso[ rst ]pentafeen |
| Greek ελληνικά | βενζο[ rst ]πενταφαίνιο |
| English English | benzo[ rst ]pentaphene |
| French français | benzo[ rst ]pentaphène |
| Croatian hrvatski | benzo[ rst ]pentafen |
| Italian italiano | benzo[ rst ]pentafene |
| Latvian latviešu | benz[ rst ]pentafēns |
| Lithuanian lietuvių | benzo[ rst ]pentafenas |
| Hungarian magyar | benzo[ rst ]pentafén |
| Maltese Malti | benżo[ rst ]pentassafen |
| Dutch Nederlands | benzo[ rst ]pentafeen |
| Polish polski | benzo[rst]pentafen |
| Portuguese português | benzo[rst]pentafeno |
| Romanian română | benzo[ rst ]pentafen |
| Slovak slovenčina | benzo[ r,s,t ]pentafén |
| Slovenian slovenščina | benzo[ rst ]pentafen |
| Finnish suomi | Bentso[ rst ]pentafeeni |
| Swedish svenska | benso[ rst ]pentafen |
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
Benzo[rst]pentaphene GHS label elements
Everything CLP Annex VI fixes for Benzo[rst]pentaphene, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Danger
Benzo[rst]pentaphene
- May cause cancer <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>.
- Suspected of causing genetic defects <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>.
- Obtain special instructions before use.
- Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/…
- IF exposed or concerned:
- Get medical advice/attention.
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open Benzo[rst]pentaphene in the GHS label constructor →
07 · Health hazards
Benzo[rst]pentaphene health hazards and exposure limits
Benzo[rst]pentaphene hazard summary
May cause irritation; [MSDSonline] See POLYCYCLIC AROMATIC HYDROCARBONS.
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
Benzo[rst]pentaphene carcinogenicity classification
Group 2B: The agent is possibly carcinogenic to humans.
Source: Hazardous Substances Data Bank (HSDB)
Dibenzo(a,i)pyrene: reasonably anticipated to be a human carcinogen. /Polycyclic Aromatic Hydrocarbons/
Source: Hazardous Substances Data Bank (HSDB)
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.
Benzo[rst]pentaphene occupational exposure limits
| Limit | Value | Source |
|---|---|---|
| IDLH | NIOSH considers coal tar pitch volatiles to be potential occupational carcinogens. /Coal tar pitch volatiles/ | Hazardous Substances Data Bank (HSDB) |
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
Benzo[rst]pentaphene 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.
Benzo[rst]pentaphene boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 275 °C (527 °F) | at 0.05 mmHg (reduced pressure) | HSDB |
Benzo[rst]pentaphene melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | 283.6 °C (542.5 °F) | HSDB |
Benzo[rst]pentaphene solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | Soluble in 1,4-dioxane, boiling glacial acetic acid (2 g/L) and boiling benzene (5 g/L); almost insoluble in diethyl ether and ethanol | HSDB |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Handling and storage
Benzo[rst]pentaphene storage and handling
Benzo[rst]pentaphene storage conditions
PRECAUTIONS FOR "CARCINOGENS": Storage site should be as close as practicable to lab in which carcinogens are to be used, so that only small quantities required for ... expt need to be carried. Carcinogens should be kept in only one section of cupboard, an explosion-proof refrigerator or freezer (depending on chemicophysical properties ...) that bears appropriate label. An inventory ... should be kept, showing quantity of carcinogen & date it was acquired ... Facilities for dispensing ... should be contiguous to storage area. /Chemical Carcinogens/
Source: Hazardous Substances Data Bank (HSDB)
Benzo[rst]pentaphene incompatible materials
Strong oxidizers. /Coal tar pitch volatiles/
Source: Hazardous Substances Data Bank (HSDB)
Benzo[rst]pentaphene reactivity
Vigorous reactions, sometimes amounting to explosions, can result from the contact between aromatic hydrocarbons, such as DIBENZ[A,I]PYRENE, and strong oxidizing agents. They can react exothermically with bases and with diazo compounds. Substitution at the benzene nucleus occurs by halogenation (acid catalyst), nitration, sulfonation, and the Friedel-Crafts reaction.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Benzo[rst]pentaphene in the storage compatibility matrix →
10 · Questions
Benzo[rst]pentaphene — frequently asked questions
What is the CAS number of Benzo[rst]pentaphene?
The CAS number of Benzo[rst]pentaphene is 189-55-9. Its EC number is 205-877-5.
What is the chemical formula of Benzo[rst]pentaphene?
The molecular formula of Benzo[rst]pentaphene is C24H14 and its molecular weight is 302.4 g/mol.
What does a Benzo[rst]pentaphene label have to show?
Under CLP Annex VI the label for Benzo[rst]pentaphene carries the pictogram Health hazard and the signal word is Danger.
Is Benzo[rst]pentaphene flammable?
CLP Annex VI assigns Benzo[rst]pentaphene 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.
Is Benzo[rst]pentaphene a carcinogen?
Yes. CLP Annex VI classifies Benzo[rst]pentaphene as a category 1A or 1B carcinogen and assigns it H350: may cause cancer. IARC places it in Group 2B: possibly carcinogenic to humans.
What is the boiling point of Benzo[rst]pentaphene?
The boiling point reported for Benzo[rst]pentaphene is 275 °C (527 °F), at 0.05 mmHg (reduced pressure) (HSDB).
What is the melting point of Benzo[rst]pentaphene?
The melting point reported for Benzo[rst]pentaphene is 283.6 °C (542.5 °F) (HSDB).
How should Benzo[rst]pentaphene be stored?
PRECAUTIONS FOR "CARCINOGENS": Storage site should be as close as practicable to lab in which carcinogens are to be used, so that only small quantities required for ... expt need to be carried. Carcinogens should be kept in only one section of cupboard, an explosion-proof refrigerator or freezer (depending on chemicophysical properties ...) that bears appropriate label. An inventory ... should be kept, showing quantity of carcinogen & date it was acquired ... Facilities for dispensing ... should be contiguous to storage area. /Chemical Carcinogens/ (Hazardous Substances Data Bank (HSDB))
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