Substance profile
Pentachloronaphthalene
Pentachloronaphthalene is a white powder with an aromatic odor.
01 · Identification
What Pentachloronaphthalene is
Pentachloronaphthalene is a white powder with an aromatic odor. Its molecular formula is C10H3Cl5 and its molecular weight is 300.4 g/mol. It boils at 250 °C, melts at 120 °C.
Under the GHS it carries the signal word Warning.
Other names for Pentachloronaphthalene
- penthachloronaphthalene
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 |
|---|---|
| H312 | Harmful in contact with skin. |
| H302 | Harmful if swallowed. |
| H315 | Causes skin irritation. |
| H319 | Causes serious eye irritation. |
| H400 | Very toxic to aquatic life. |
| H410 | Very toxic to aquatic life with long lasting effects. |
Precautionary statements: P264, P270, P273, P280, P301, P302, P305, P312, P313, P330, P332, P337, P338, P352, P391, P501
03 · Physical and chemical properties
Pentachloronaphthalene 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 | 250 °C (482 °F) | initial boiling point | HSDB |
| 335.56 °C (636 °F) | NIOSH | ||
| 335.56 °C (636 °F) | at 760 mmHg | CAMEO | |
| Melting point | 120 °C (248 °F) | HSDB | |
| Density | 1.67 g/cm³ | NIOSH | |
| 1.67 g/cm³ | at 25 °C | HSDB | |
| Solubility | ... Soluble in organic solvents. | HSDB | |
| Insoluble | NIOSH | ||
| Vapor pressure | 1 mmHg | below this value | NIOSH |
| 1 mmHg | below this value, at 20 °C | HSDB | |
| Flash point | 230 °C (446 °F) | OPEN CUP | HSDB |
| Lower explosive limit (LEL) | Noncombustible Solid | NIOSH | |
| Vapor density | 10.4 (air = 1) | ICSC |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Source notes
Further notes on Pentachloronaphthalene
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.
Solubility
POLYCHLORONAPHTHALENES HAVE GOOD SOLUBILITY IN CHLORINATED & AROMATIC SOLVENTS, & PETROLEUM NAPHTHAS; LIMITED IN KETONES, ETHERS, ACETATES, MINERAL OILS; INSOL IN ALC, WATER. /POLYCHLORONAPHTHALENES/
Source: HSDB
05 · Handling and storage
Storing and handling Pentachloronaphthalene
Storage conditions
Materials which are toxic as stored or which decompose into toxic components due to contact with heat ... should be stored in cool, well-ventilated place, out of direct rays of sun, away from areas of high fire hazard, and ... periodically inspected and monitored.
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
Strong oxidizers.
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
PENTACHLORONAPHTHALENE is non-flammable, but combustible. Gives off irritating or toxic gases in a fire. Incompatible with strong oxidizing agents. Reacts violently with aluminum, with bases, and with liquid O2.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Pentachloronaphthalene in the storage compatibility matrix →