Substance profile
Sodium Selenite
Sodium Selenite is tetragonal prisms.
01 · Identification
What Sodium Selenite is
Sodium Selenite is tetragonal prisms. It melts at 710 °C, is practically insoluble in water.
Under the GHS it carries the signal word Danger.
02 · Identifiers
Sodium Selenite identifiers and molecular data
Sodium Selenite CAS number and EC number
03 · GHS classification
Sodium Selenite hazard classification
Harmonised classification under CLP Annex VI. This is the legally binding classification in the EU; other jurisdictions may differ.
Sodium Selenite pictograms and signal word
Sodium Selenite hazard class and category
| Hazard class | Category | From code | Pictogram |
|---|---|---|---|
| Acute toxicity - oral GHS chapter 3.1 | Category 1 or 2 | H300 | GHS06 |
| Acute toxicity - inhalation GHS chapter 3.1 | Category 3 | H331 | GHS06 |
| Skin sensitisation GHS chapter 3.4 | Category 1 or 1A or 1B | H317 | GHS07 |
| Hazardous to the aquatic environment - chronic GHS chapter 4.1 | Category 2 | H411 | 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.
Sodium Selenite hazard statements (H-codes)
| Code | Hazard statement |
|---|---|
| H300 | Fatal if swallowed. |
| H331 | Toxic if inhaled. |
| H317 | May cause an allergic skin reaction. |
| H411 | Toxic to aquatic life with long lasting effects. |
Sodium Selenite supplemental EU statements (EUH)
| Code | Statement |
|---|---|
| EUH031 | Contact with acids liberates toxic gas. |
This page lists only the codes assigned to Sodium Selenite. 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 Sodium Selenite
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 Sodium Selenite 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
Sodium Selenite precautionary statements
CLP Annex VI assigns 15 precautionary statements to Sodium Selenite. 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
Sodium Selenite 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 | натриев селенит |
| Spanish español | Selenito de sodio |
| Czech čeština | seleničitan sodný |
| Danish dansk | natriumselenit |
| German Deutsch | Natriumselenit |
| Estonian eesti | naatriumselenit |
| Greek ελληνικά | σεληνιώδες νάτριο |
| English English | sodium selenite |
| French français | sélénite de sodium |
| Croatian hrvatski | natrijev selenit |
| Italian italiano | sodio selenuro |
| Latvian latviešu | nātrija selenīts |
| Lithuanian lietuvių | natrio selenitas |
| Hungarian magyar | nátrium-szelenit |
| Maltese Malti | selenit tas-sodju |
| Dutch Nederlands | natriumseleniet |
| Polish polski | selenin sodu |
| Portuguese português | selenito de sódio |
| Romanian română | selenit de sodiu |
| Slovak slovenčina | seleničitan sodný |
| Slovenian slovenščina | natrijev selenit |
| Finnish suomi | natriumseleniitti |
| Swedish svenska | natriumselenit |
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
Sodium Selenite GHS label elements
Everything CLP Annex VI fixes for Sodium Selenite, laid out the way it appears on a label. The greyed lines are the parts only the supplier can fill in.
Danger
Sodium Selenite
- Fatal if swallowed.
- Toxic if inhaled.
- May cause an allergic skin reaction.
- Toxic to aquatic life with long lasting effects.
- Contact with acids liberates toxic gas.
- Do not breathe dust/fume/gas/mist/vapours/spray.
- Avoid breathing dust/fume/gas/mist/vapours/spray.
- Do not eat, drink or smoke when using this product.
- Use only outdoors or in a well-ventilated area.
- Contaminated work clothing should not be allowed out of the workplace.
- Avoid release to the environment.
- Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/…
- IF SWALLOWED:
- IF INHALED:
- Immediately call a POISON CENTER/doctor/…
- Get medical advice/attention.
- Rinse mouth.
- If skin irritation or rash occurs:
- Collect spillage.
- Dispose of contents/container to …
Supplier name, address and telephone number· Product identifier·Nominal quantity
Need this as an actual label? Open Sodium Selenite in the GHS label constructor →
07 · Health hazards
Sodium Selenite health hazards and exposure limits
Sodium Selenite hazard summary
Reported to be a skin sensitizer, but insufficient controls were tested; [Kanerva, p. 1499] Decomposed by flames and hot surfaces producing toxic gases; A skin, eye, and respiratory tract irritant; The substance may cause effects on the liver, heart, nervous system, and gastrointestinal tract. The substance may have effects on the central nervous system, bone, and blood. [ICSC] Nontoxic when fed to hamsters at 10 ppm for 42 days; Histological changes in liver at 20 ppm (0.7 mg selenium/kg body weight/day); [HSDB] May cause skin, eye, and mucous membrane irritation; [CAMEO] An eye and mild skin irritant; May cause skin sensitization; [eChemPortal: ESIS] May cause irritation; May cause skin sensitization; [MSDSonline] Sodium selenite is orders of magnitude more toxic than many other selenium compounds. [NIOSH IDLH Documentation] See Selenium.
Source: Haz-Map, Information on Hazardous Chemicals and Occupational Diseases
Sodium Selenite occupational exposure limits
| Limit | Value | Source |
|---|---|---|
| PEL | 0.2 [mg/m3], as Se | Haz-Map, Information on Hazardous Chemicals and Occupational Diseases |
| IDLH | 1.0 [mg/m3], as Se | Haz-Map, Information on Hazardous Chemicals and Occupational Diseases |
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
Sodium Selenite 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.
Sodium Selenite boiling point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Boiling point | Decomposes (NTP, 1992) | decomposes | CAMEO |
Sodium Selenite melting point
| Property | Value | Conditions | Source |
|---|---|---|---|
| Melting point | 710 °C (1310 °F) | DOE PAC | |
| 710 °C (1310 °F) | decomposes, decomposes | HSDB | |
| 710 °C (1310 °F) | decomposes | CAMEO |
Sodium Selenite density
| Property | Value | Conditions | Source |
|---|---|---|---|
| Density | 3.1 g/cm³ | HSDB |
Sodium Selenite solubility
| Property | Value | Conditions | Source |
|---|---|---|---|
| Solubility | Insoluble in alcohol | HSDB | |
| 89.8 g/100 g water | HSDB | ||
| greater than or equal to 100 mg/mL at 70.7 °F (NTP, 1992) | at 21.5 °C | CAMEO |
Sodium Selenite vapor pressure
| Property | Value | Conditions | Source |
|---|---|---|---|
| Vapor pressure | 0.001 mmHg | below this value, at 20 °C | CAMEO |
Values compiled from PubChem Laboratory Chemical Safety Summary. Temperatures converted to Fahrenheit for reference.
09 · Handling and storage
Sodium Selenite storage and handling
Sodium Selenite safe storage
Separated from strong acids and food and feedstuffs. Well closed. Store in an area without drain or sewer access.
Source: ILO-WHO International Chemical Safety Cards (ICSCs)
Sodium Selenite incompatible materials
Do not use metal and acid to reduce selenium compounds. This will produce toxic gaseous hydrogen selenide. /Selenium compounds/
Source: Hazardous Substances Data Bank (HSDB)
Sodium Selenite reactivity
SODIUM SELENITE is incompatible with strong acids. (NTP, 1992)
Source: CAMEO Chemicals
Planning storage for a mix of chemicals? Check Sodium Selenite in the storage compatibility matrix →
10 · Questions
Sodium Selenite — frequently asked questions
What is the CAS number of Sodium Selenite?
The CAS number of Sodium Selenite is 10102-18-8. Its EC number is 233-267-9.
What does a Sodium Selenite label have to show?
Under CLP Annex VI the label for Sodium Selenite carries the pictograms Skull and crossbones and Environment and the signal word is Danger.
Is Sodium Selenite flammable?
CLP Annex VI assigns Sodium Selenite 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 Sodium Selenite a carcinogen?
CLP Annex VI records no harmonised carcinogenicity classification for Sodium Selenite. 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 exposure limit for Sodium Selenite?
The US occupational exposure limit reported for Sodium Selenite is 0.2 [mg/m3], as Se (Haz-Map, Information on Hazardous Chemicals and Occupational Diseases). Limits differ by country: the EU sets its own indicative and binding values, and the figure that applies at a given workplace is the one in the local regulation.
What is the boiling point of Sodium Selenite?
The boiling point reported for Sodium Selenite is Decomposes (NTP, 1992), decomposes (CAMEO).
What is the melting point of Sodium Selenite?
The melting point reported for Sodium Selenite is 710 °C (1310 °F) (DOE PAC).
Nearby
Substances next to Sodium Selenite
Keep going: substances starting with S, or search the whole database by name, CAS number, pictogram or signal word.