SECTION 1: Identification of the substance/mixture and of the company/undertaking
Product identifiers
Product name : Sodium selenite pentahydrate
REACH No. : A registration number is not available for this substance as the substance
or its uses are exempted from registration, the annual tonnage does not
require a registration or the registration is envisaged for a later
registration deadline.
CAS-No. : 26970-82-1
Relevant identified uses of the substance or mixture and uses advised against
Identified uses : Laboratory chemicals, Manufacture of substances
SECTION 2: Hazards identification
Classification of the substance or mixture
Classification according to Regulation (EC) No 1272/2008
Acute toxicity, Oral (Category 2), H300
Acute toxicity, Inhalation (Category 3), H331
Skin sensitisation (Category 1), H317
Chronic aquatic toxicity (Category 2), H411
For the full text of the H-Statements mentioned in this Section, see Section 16.
Classification according to EU Directives 67/548/EEC or 1999/45/EC
T+ Very toxic R28
T Toxic R23
R31
R43
N Dangerous for the R51/53
environment
For the full text of the R-phrases mentioned in this Section, see Section 16.
Label elements
Labelling according Regulation (EC) No 1272/2008
Pictogram
Signal word Danger
Hazard statement(s)
H300 Fatal if swallowed.
H317 May cause an allergic skin reaction.
H331 Toxic if inhaled.
H411 Toxic to aquatic life with long lasting effects.
Precautionary statement(s)
P261 Avoid breathing dust.
P264 Wash hands thoroughly after handling.
P273 Avoid release to the environment.
P280 Wear protective gloves.
P301 + P310 IF SWALLOWED: Immediately call a POISON CENTER or doctor/
physician.
P311 Call a POISON CENTER or doctor/ physician.
Supplemental Hazard information (EU)
EUH031 Contact with acids liberates toxic gas.
Other hazards - none
SECTION 3: Composition/information on ingredients
Substances
Formula : Na2O3Se · 5H2O
Molecular Weight : 263,01 g/mol
CAS-No. : 26970-82-1
EC-No. : 233-267-9
Hazardous ingredients according to Regulation (EC) No 1272/2008
Component Classification Concentration
Sodium selenite pentahydrate
CAS-No. 26970-82-1 Acute Tox. 2; Acute Tox. 3; <= 100 %
EC-No. 233-267-9 Skin Sens. 1; Aquatic Chronic
Index-No. 034-003-00-3 2; H300, H317, H331, H411,
EUH031
For the full text of the H-Statements and R-Phrases mentioned in this Section, see Section 16
SECTION 4: First aid measures
Description of first aid measures
General advice
Consult a physician. Show this safety data sheet to the doctor in attendance.
If inhaled
If breathed in, move person into fresh air. If not breathing, give artificial respiration. Consult a physician.
In case of skin contact
Wash off with soap and plenty of water. Take victim immediately to hospital. Consult a physician.
In case of eye contact
Flush eyes with water as a precaution.
If swallowed
Never give anything by mouth to an unconscious person. Rinse mouth with water. Consult a physician.
Most important symptoms and effects, both acute and delayed
The most important known symptoms and effects are described in the labelling (see section 2.2) and/or in
section 11
Indication of any immediate medical attention and special treatment needed
no data available
SECTION 5: Firefighting measures
Extinguishing media
Suitable extinguishing media
Dry powder
Special hazards arising from the substance or mixture
Sodium oxides, Selenium/selenium oxides
Advice for firefighters
Wear self contained breathing apparatus for fire fighting if necessary.
Further information
no data available
SECTION 6: Accidental release measures
Personal precautions, protective equipment and emergency procedures
Wear respiratory protection. Avoid dust formation. Avoid breathing vapours, mist or gas. Ensure
adequate ventilation. Evacuate personnel to safe areas. Avoid breathing dust.
For personal protection see section 8.
Environmental precautions
Prevent further leakage or spillage if safe to do so. Do not let product enter drains. Discharge into the
environment must be avoided.
Methods and materials for containment and cleaning up
Pick up and arrange disposal without creating dust. Sweep up and shovel. Do not flush with water. Keep
in suitable, closed containers for disposal.
Reference to other sections
For disposal see section 13.
SECTION 7: Handling and storage
Precautions for safe handling
Avoid contact with skin and eyes. Avoid formation of dust and aerosols.
Provide appropriate exhaust ventilation at places where dust is formed.
For precautions see section 2.2.
Conditions for safe storage, including any incompatibilities
Store in cool place. Keep container tightly closed in a dry and well-ventilated place.
Never allow product to get in contact with water during storage. Do not store near acids.
hygroscopic
Specific end use(s)
A part from the uses mentioned in section 1.2 no other specific uses are stipulated
SECTION 8: Exposure controls/personal protection
Control parameters
Components with workplace control parameters
Exposure controls
Appropriate engineering controls
Avoid contact with skin, eyes and clothing. Wash hands before breaks and immediately after handling
the product.
Personal protective equipment
Eye/face protection
Face shield and safety glasses Use equipment for eye protection tested and approved under
appropriate government standards such as NIOSH (US) or EN 166(EU).
Skin protection
Handle with gloves. Gloves must be inspected prior to use. Use proper glove removal technique
(without touching glove's outer surface) to avoid skin contact with this product. Dispose of
contaminated gloves after use in accordance with applicable laws and good laboratory practices.
Wash and dry hands.
The selected protective gloves have to satisfy the specifications of EU Directive 89/686/EEC and
the standard EN 374 derived from it.
Full contact
Material: Nitrile rubber
Minimum layer thickness: 0,11 mm
Break through time: 480 min
Material tested:Dermatril® (KCL 740 / Z677272, Size M)
Splash contact
Material: Nitrile rubber
Minimum layer thickness: 0,11 mm
Break through time: 480 min
Material tested:Dermatril® (KCL 740 / Z677272, Size M)
data source: KCL GmbH, D-36124 Eichenzell, phone +49 (0)6659 87300,
test method: EN374
If used in solution, or mixed with other substances, and under conditions which differ from EN 374,
contact the supplier of the CE approved gloves. This recommendation is advisory only and must
be evaluated by an industrial hygienist and safety officer familiar with the specific situation of
anticipated use by our customers. It should not be construed as offering an approval for any
specific use scenario.
Body Protection
Complete suit protecting against chemicals, The type of protective equipment must be selected
according to the concentration and amount of the dangerous substance at the specific workplace.
Respiratory protection
Where risk assessment shows air-purifying respirators are appropriate use a full-face particle
respirator type N100 (US) or type P3 (EN 143) respirator cartridges as a backup to engineering
controls. If the respirator is the sole means of protection, use a full-face supplied air respirator. Use
respirators and components tested and approved under appropriate government standards such
as NIOSH (US) or CEN (EU).
Control of environmental exposure
Prevent further leakage or spillage if safe to do so. Do not let product enter drains. Discharge into
the environment must be avoided.
SECTION 9: Physical and chemical properties
Information on basic physical and chemical properties
a) Appearance Form: crystalline
Colour: white
b) Odour no data available
c) Odour Threshold no data available
d) pH 9 at 50 g/l at 20 °C
e) Melting point/freezing no data available
point
f) Initial boiling point and no data available
boiling range
g) Flash point not applicable
h) Evapouration rate no data available
i) Flammability (solid, gas) no data available
j) Upper/lower no data available
flammability or
explosive limits
k) Vapour pressure no data available
l) Vapour density no data available
m) Relative density no data available
n) Water solubility soluble
o) Partition coefficient: n- no data available
octanol/water
p) Auto-ignition no data available
temperature
q) Decomposition > 300 °C -
temperature
r) Viscosity no data available
s) Explosive properties no data available
t) Oxidizing properties no data available
Other safety information
no data available
SECTION 10: Stability and reactivity
Reactivity
no data available
Chemical stability
Stable under recommended storage conditions.
Possibility of hazardous reactions
no data available
Conditions to avoid
no data available
Incompatible materials
Strong oxidizing agents, Strong acids
Hazardous decomposition products
Other decomposition products - no data available
In the event of fire: see section 5
SECTION 11: Toxicological information
Information on toxicological effects
Acute toxicity
LD50 Oral - rat - 7 mg/kg
Skin corrosion/irritation
no data available
Serious eye damage/eye irritation
no data available
Respiratory or skin sensitisation
Germ cell mutagenicity
mouse
mammary gland
DNA damage
mouse
mammary gland
DNA inhibition
Carcinogenicity
This product is or contains a component that is not classifiable as to its carcinogenicity based on its IARC,
ACGIH, NTP, or EPA classification.
IARC: A4 - Not classifiable as a human carcinogen (Sodium selenite pentahydrate)
3 - Group 3: Not classifiable as to its carcinogenicity to humans (Sodium selenite
pentahydrate)
Reproductive toxicity
Reproductive toxicity - mouse - Subcutaneous
Effects on Fertility: Abortion.
Reproductive toxicity - mouse - Subcutaneous
Effects on Newborn: Live birth index (# fetuses per litter; measured after birth).
Developmental Toxicity - mouse - Oral
Effects on Embryo or Fetus: Fetotoxicity (except death, e.g., stunted fetus). Specific Developmental
Abnormalities: Musculoskeletal system.
Specific target organ toxicity - single exposure
no data available
Specific target organ toxicity - repeated exposure
no data available
Aspiration hazard
no data available
Additional Information
RTECS: VS7420000
Nausea, Dizziness, Headache, anemia, Salivation, Tremors, Alopecia., Vomiting, Dermatitis, To the best of
our knowledge, the chemical, physical, and toxicological properties have not been thoroughly investigated.
SECTION 12: Ecological information
Toxicity
Toxicity to fish LC50 - Cyprinodon variegatus (sheepshead minnow) - 4,5 - 12,0 mg/l - 96,0 h
Toxicity to daphnia and EC50 - Daphnia magna (Water flea) - 7,9 mg/l - 48 h
other aquatic
invertebrates
Toxicity to algae EC50 - Pseudokirchneriella subcapitata (green algae) - 3,2 - 10,0 mg/l - 72 h
Persistence and degradability
no data available
Bioaccumulative potential
no data available
Mobility in soil
no data available
Results of PBT and vPvB assessment
PBT/vPvB assessment not available as chemical safety assessment not required/not conducted
Other adverse effects
Toxic to aquatic life with long lasting effects.
SECTION 13: Disposal considerations
Waste treatment methods
Product
Offer surplus and non-recyclable solutions to a licensed disposal company. Dissolve or mix the material
with a combustible solvent and burn in a chemical incinerator equipped with an afterburner and scrubber.
Contaminated packaging
Dispose of as unused product.
SECTION 14: Transport information
UN number
ADR/RID: 2630 IMDG: 2630 IATA: 2630
UN proper shipping name
ADR/RID: SELENITES
IMDG: SELENITES
IATA: Selenites
Transport hazard class(es)
ADR/RID: 6.1 IMDG: 6.1 IATA: 6.1
Packaging group
ADR/RID: I IMDG: I IATA: I
Environmental hazards
ADR/RID: yes IMDG Marine pollutant: yes IATA: no
Special precautions for user
no data available
SECTION 15 - REGULATORY INFORMATION
N/A
SECTION 16 - ADDITIONAL INFORMATION
N/A