Substance profile
Pyrithione Zinc
Pyrithione Zinc is an off-white powder with a mild odor.
01 · Identification
What Pyrithione Zinc is
Pyrithione Zinc is an off-white powder with a mild odor. Its molecular formula is C10H8N2O2S2Zn and its molecular weight is 317.7 g/mol. It melts at 240 °C, is practically insoluble in water.
Under the GHS it carries the signal word Danger.
Other names for Pyrithione Zinc
- (T-4)- bis[1-(hydroxy-.kappa.O)pyridine-2(1H)- thionato-.kappa.S]zinc
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 |
|---|---|
| H360D | May damage the unborn child. |
| H330 | Fatal if inhaled. |
| H301 | Toxic if swallowed. |
| H372 | Causes 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>. |
| H318 | Causes serious eye damage. |
| H400 | Very toxic to aquatic life. |
| H410 | Very toxic to aquatic life with long lasting effects. |
Precautionary statements: P260, P270, P271, P273, P280, P301, P304, P305, P310, P314, P330, P338, P391, P501
03 · Physical and chemical properties
Pyrithione Zinc 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 |
|---|---|---|---|
| Melting point | 240 °C (464 °F) | decomposes | HSDB |
| Density | 0.35 g/cm³ | HSDB | |
| 1.782 g/cm³ | at 25 °C | HSDB | |
| Solubility | Insoluble (<1 mg/ml at 70 °F) (NTP, 1992) | at 21.11 °C | CAMEO |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling Pyrithione Zinc
Storage conditions
Safe Storage of Pesticides. Always store pesticides in their original containers, complete with labels that list ingredients, directions for use, and first aid steps in case of accidental poisoning. Never store pesticides in cabinets with or near food, animal feed, or medical supplies. Do not store pesticides in places where flooding is possible or in places where they might spill or leak into wells, drains, ground water, or surface water. /Residential uses/
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
ZINC PYRITHIONE is a coordination compound where zinc is chelated by oxygen and sulfur donor atoms on the pyrithione ligand. It is a basic salt.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Pyrithione Zinc in the storage compatibility matrix →