Substance profile
Lead hydrogen arsenate
Lead hydrogen arsenate is white monoclinic crystals and is odorless.
01 · Identification
What Lead hydrogen arsenate is
Lead hydrogen arsenate is white monoclinic crystals and is odorless. Its molecular formula is AsHO4Pb and its molecular weight is 347 g/mol. It melts at 280 °C, is practically insoluble in water.
Under the GHS it carries the signal word Danger. It is classed as carcinogens.
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 |
|---|---|
| H350 | May cause cancer <state route of exposure if it is conclusively proven that no other routes of exposure cause the hazard>. |
| H360Df | May damage the unborn child. Suspected of damaging fertility. |
| H331 | Toxic if inhaled. |
| H301 | Toxic if swallowed. |
| H373 | May cause 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>. |
| H400 | Very toxic to aquatic life. |
| H410 | Very toxic to aquatic life with long lasting effects. |
Precautionary statements: P201, P260, P270, P271, P273, P280, P301, P304, P308, P310, P313, P314, P330, P391, P501
03 · Physical and chemical properties
Lead hydrogen arsenate 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 | 280 °C (536 °F) | decomposes, decomposes | HSDB |
| Density | 5.943 g/cm³ | HSDB | |
| 5.8 g/cm³ | ICSC | ||
| 5.943 g/cm³ | at 25 °C | DOE PAC | |
| Solubility | Insoluble in water | HSDB | |
| Soluble in nitric acid, alkalies | HSDB | ||
| Solubility in water, g/100ml: 0.0003 (none) | ICSC | ||
| Autoignition temperature | Not flammable (USCG, 1999) | CAMEO |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
04 · Handling and storage
Storing and handling Lead hydrogen arsenate
Storage conditions
Store in a secure poison location. ... Lead arsenate must be stored to avoid contact with oxidizers (such as perchlorates, peroxides, permanganates, chlorates and nitrates) and chemically active metals (such as potassium, sodium, magnesium, and zinc), since violent reactions occur. Avoid the presence of acids since arsine, a very deadly gas, is released in the presence of acid or acid mist. A regulated, marked area should be established where this chemical is handled, used, or stored in compliance with OSHA Standard 1910.1045.
Source: Hazardous Substances Data Bank (HSDB)
Incompatible materials
Violent reactions occur from contact with oxidizers, chemically active metals, strong acids. Acids and acid mists cause the release of arsine, a deadly gas.
Source: Hazardous Substances Data Bank (HSDB)
Reactivity
LEAD ARSENATE has weak oxidizing or reducing powers. Redox reactions can however still occur. The majority of compounds in this class are slightly soluble or insoluble in water. If soluble in water, then the solutions are usually neither strongly acidic nor strongly basic. These compounds are not water-reactive.
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Lead hydrogen arsenate in the storage compatibility matrix →