Substance profile
Pentachlorobenzene
Pentachlorobenzene is colorless needles with a pleasant aroma odor.
01 · Identification
What Pentachlorobenzene is
Pentachlorobenzene is colorless needles with a pleasant aroma odor. Its molecular formula is C6HCl5 and its molecular weight is 250.3 g/mol. It boils at 277 °C, melts at 86 °C.
Under the GHS it carries the signal word Danger.
02 · Identifiers
Pentachlorobenzene identifiers and molecular data
Pentachlorobenzene CAS number and EC number
Pentachlorobenzene molecular formula and molecular weight
03 · GHS classification
Pentachlorobenzene hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Pentachlorobenzene pictograms and signal word
Pentachlorobenzene hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Flammable solids GHS chapter 2.7 | Category 1 or 2 | H228 | GHS02 |
| Acute toxicity - oral GHS chapter 3.1 | Category 4 | H302 | GHS07 |
| Hazardous to the aquatic environment - acute GHS chapter 4.1 | Category 1 | H400 | GHS09 |
| Hazardous to the aquatic environment - chronic GHS chapter 4.1 | Category 1 | H410 | 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.
Pentachlorobenzene hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H228 | Flammable solid. |
| H302 | Harmful if swallowed. |
| H400 | Very toxic to aquatic life. |
| H410 | Very toxic to aquatic life with long lasting effects. |
This page lists only the codes assigned to Pentachlorobenzene. 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 Pentachlorobenzene
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 Pentachlorobenzene 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
Pentachlorobenzene precautionary statements
CLP Annex VI assigns 7 precautionary statements to Pentachlorobenzene. 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
Pentachlorobenzene 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 | пентахлоробензен |
| Spanish español | Pentaclorobenceno |
| Czech čeština | pentachlorbenzen |
| Danish dansk | pentachlorbenzen |
| German Deutsch | Pentachlorbenzol |
| Estonian eesti | pentaklorobenseen |
| Greek ελληνικά | πενταχλωροβενζόλιο |
| English English | pentachlorobenzene |
| French français | pentachlorobenzène |
| Croatian hrvatski | pentaklorbenzen |
| Italian italiano | pentaclorobenzene |
| Latvian latviešu | pentahlorbenzols |
| Lithuanian lietuvių | pentachlorbenzenas |
| Hungarian magyar | pentaklórbenzol |
| Maltese Malti | pentaklorobenżen |
| Dutch Nederlands | pentachloorbenzeen |
| Polish polski | pentachlorobenzen |
| Portuguese português | pentaclorobenzeno |
| Romanian română | pentaclorobenzen |
| Slovak slovenčina | pentachlórbenzén |
| Slovenian slovenščina | pentaklorobenzen |
| Finnish suomi | pentaklooribentseeni |
| Swedish svenska | pentaklorbensen |
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
Pentachlorobenzene GHS label elements
Everything CLP Annex VI fixes for Pentachlorobenzene, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Danger
Pentachlorobenzene
- Flammable solid.
- Harmful if swallowed.
- Very toxic to aquatic life.
- Very toxic to aquatic life with long lasting effects.
- Do not eat, drink or smoke when using this product.
- Avoid release to the environment.
- IF SWALLOWED:
- Call a POISON CENTER/doctor/… if you feel unwell.
- Rinse mouth.
- Collect spillage.
- Dispose of contents/container to …
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open Pentachlorobenzene in the GHS label constructor →
07 · Health hazards
Pentachlorobenzene health hazards and exposure limits
Pentachlorobenzene hazard summary
May cause liver injury; Reproductive toxin in animals; Produces HCl when burned; [ICSC] It is relatively unreactive, and it is insoluble in water. [CAMEO] See 1,2,3,5-Tetrachlorobenzene.
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
Pentachlorobenzene carcinogenicity classification
CLASSIFICATION: D; not classifiable as to human carcinogenicity. BASIS FOR CLASSIFICATION: No human data and no animal data available. HUMAN CARCINOGENICITY DATA: None. ANIMAL CARCINOGENICITY DATA: None.
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.
08 · Physical and chemical properties
Pentachlorobenzene 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.
Pentachlorobenzene boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | 277 °C (530.6 °F) | HSDB | |
| 277.22 °C (531 °F) | at 760 mmHg | CAMEO | |
| 277 °C (530.6 °F) | at 760 mmHg | DOE PAC |
Pentachlorobenzene melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | 86 °C (186.8 °F) | HSDB | |
| 86.11 °C (187 °F) | CAMEO |
Pentachlorobenzene density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 1.8342 g/cm³ | CAMEO | |
| 1.8 g/cm³ | ICSC | ||
| 1.8342 g/cm³ | at 16.5 °C | HSDB |
Pentachlorobenzene solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | In water, 0.18 to 1.34 mg/L at 22-25 °C | HSDB | |
| Insoluble in ethanol; slightly soluble in ether, benzene, chloroform and carbon disulfide | HSDB | ||
| In water, 0.831 mg/L at 25 °C | at 25 °C | HSDB |
Pentachlorobenzene vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 0.002 mmHg | at 25 °C | HSDB |
| 0.0065 mmHg | at 25 °C | DOE PAC | |
| 0.0065 mmHg | Haz-Map |
Pentachlorobenzene vapor density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor density | 8.6 (air = 1) | ICSC |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Fire and explosion
Pentachlorobenzene 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.
Pentachlorobenzene fire potential
Not flammable or combustible.
Source: Hazardous Substances Data Bank (HSDB)
10 · Handling and storage
Pentachlorobenzene storage and handling
Pentachlorobenzene safe storage
Provision to contain effluent from fire extinguishing.
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
Pentachlorobenzene storage conditions
Keep container tightly closed in a dry and well-ventilated place.
Source: Hazardous Substances Data Bank (HSDB)
Pentachlorobenzene incompatible materials
... On contact with acids or acid fumes ... /chlorides/ evolve highly toxic /hydrogen chloride/ fumes. /Chlorides/
Source: Hazardous Substances Data Bank (HSDB)
Pentachlorobenzene reactivity
PENTACHLOROBENZENE is relatively unreactive. May be incompatible with strong oxidizing and reducing agents. Also may be incompatible with many amines, nitrides, azo/diazo compounds, alkali metals, and epoxides.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Pentachlorobenzene in the storage compatibility matrix →
11 · Questions
Pentachlorobenzene — frequently asked questions
What is the CAS number of Pentachlorobenzene?
The CAS number of Pentachlorobenzene is 608-93-5. Its EC number is 210-172-0.
What is the chemical formula of Pentachlorobenzene?
The molecular formula of Pentachlorobenzene is C6HCl5 and its molecular weight is 250.3 g/mol.
What does a Pentachlorobenzene label have to show?
Under CLP Annex VI the label for Pentachlorobenzene carries the pictograms Flame, Exclamation mark and Environment and the signal word is Danger.
Is Pentachlorobenzene flammable?
Yes. CLP Annex VI assigns Pentachlorobenzene H228 — flammable solid.
Is Pentachlorobenzene a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for Pentachlorobenzene. 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.
What is the boiling point of Pentachlorobenzene?
The boiling point reported for Pentachlorobenzene is 277 °C (530.6 °F) (HSDB).
What is the melting point of Pentachlorobenzene?
The melting point reported for Pentachlorobenzene is 86 °C (186.8 °F) (HSDB).
How should Pentachlorobenzene be stored?
Keep container tightly closed in a dry and well-ventilated place. (Hazardous Substances Data Bank (HSDB))
Nearby
Substances next to Pentachlorobenzene
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