NILE
CHEMICALS
NILE
CHEMICALS
Synonyms: Elemental Selenium;
CAS No.: 7782-49-2
Molecular Weight: 78.96
Chemical Formula: Se
Health Rating: 3 - Severe (Life)
Flammability Rating: 0 - None
Reactivity Rating: 1 - Slight
Contact Rating: 2 - Moderate
Lab Protective Equip: GOGGLES; LAB COAT; PROPER GLOVES
Storage Color Code: Blue (Health)
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Potential Health Effects
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Inhalation:Severe irritant to the respiratory system. Soreness, coughing,
labored breathing are symptoms which may subside and return. Lung edema may
occur in acute cases. Cases with flu-like symptoms resembling metal fume fever
within 24 hours of exposure have been reported.
Ingestion:May cause severe irritation to the mouth and throat.
Gastrointestinal disturbances may be expected with nausea, abdominal pain, and
vomiting.
Skin Contact:Causes severe irritation. Symptoms include redness, itching
and pain.
Eye Contact:May cause severe irritation, redness, pain.
Chronic Exposure:Chronic exposure may cause odor of garlic on breath,
fatigue, irritability, repsiratory tract irritation, gastrointestinal
irritation, metallic taste, and allergic eye reaction. Based on animal studies,
may cause blood, liver, kidney and spleen effects.
Aggravation of Pre-existing Conditions:
Person with a history of asthma, allergies, or known sensitization to selenium,
or with a history of other chronic respiratory disease, gastrointestinal
disturbances, disorders of the liver or kidneys, or recurrent dermatitis would
be expected to be at increased risk from exposure.
Inhalation:Remove to fresh air. If not breathing,
give artificial respiration. If breathing is difficult, give oxygen. Get medical
attention.
Ingestion:Do NOT induce vomiting. Give large amounts of water. Never give
anything by mouth to an unconscious person. Get medical attention.
Skin Contact:Immediately flush skin with plenty of water for at least 15
minutes. Remove contaminated clothing and shoes. Get medical attention. Wash
clothing before reuse. Thoroughly clean shoes before reuse.
Eye Contact:Immediately flush eyes with plenty of water for at least 15
minutes, lifting lower and upper eyelids occasionally. Get medical attention
immediately.
Fire:Not considered to be a fire hazard.
Explosion:Not considered to be an explosion hazard.
Fire Extinguishing Media:Use any means suitable for extinguishing
surrounding fire.
Special Information:In the event of a fire, wear full protective clothing
and NIOSH-approved self-contained breathing apparatus with full facepiece
operated in the pressure demand or other positive pressure mode.
Ventilate area of leak or spill. Keep unnecessary and unprotected people away from area of spill. Wear appropriate personal protective equipment as specified in Section 8. Spills: Pick up and place in a suitable container for reclamation or disposal, using a method that does not generate dust. US Regulations (CERCLA) require reporting spills and releases to soil, water and air in excess of reportable quantities.
Keep in a tightly closed container, stored in a cool, dry, ventilated area. Protect against physical damage. Isolate from incompatible substances. Containers of this material may be hazardous when empty since they retain product residues (dust, solids); observe all warnings and precautions listed for the product.
Airborne Exposure Limits:
-OSHA Permissible Exposure Limit (PEL):
0.2 mg/m3, Selenium Compounds, as Se
-ACGIH Threshold Limit Value (TLV):
0.2 mg/m3, Selenium & Compounds, as Se
Ventilation System:A system of local and/or general exhaust is
recommended to keep employee exposures below the Airborne Exposure Limits. Local
exhaust ventilation is generally preferred because it can control the emissions
of the contaminant at its source, preventing dispersion of it into the general
work area. Please refer to the ACGIH document, Industrial Ventilation, A
Manual of Recommended Practices, most recent edition, for details.
Personal Respirators (NIOSH Approved):If the exposure limit is exceeded,
a half-face dust/mist respirator may be worn for up to ten times the exposure
limit or the maximum use concentration specified by the appropriate regulatory
agency or respirator supplier, whichever is lowest. A full-face piece dust/mist
respirator may be worn up to 50 times the exposure limit, or the maximum use
concentration specified by the appropriate regulatory agency, or respirator
supplier, whichever is lowest. For emergencies or instances where the exposure
levels are not known, use a full-facepiece positive-pressure, air-supplied
respirator. WARNING: Air-purifying respirators do not protect workers in
oxygen-deficient atmospheres.
Skin Protection:Wear impervious protective clothing, including boots,
gloves, lab coat, apron or coveralls, as appropriate, to prevent skin contact.
Eye Protection:Use chemical safety goggles and/or full face shield where
dusting or splashing of solutions is possible. Maintain eye wash fountain and
quick-drench facilities in work area.
Appearance: Small blue-black metallic shot.
Odor: Odorless.
Solubility: Insoluble in water.
Specific Gravity: 4.26-4.81
pH: No information found.
% Volatiles by volume @ 21C (70F): 0
Boiling Point: 690C (1274F)
Melting Point: 170 - 217C (338 - 423F)
Vapor Density (Air=1): Not applicable.
Vapor Pressure (mm Hg): Not applicable.
Evaporation Rate (BuAc=1): Not applicable.
Stability:Stable under ordinary conditions of use
and storage.
Hazardous Decomposition Products:Toxic oxides of selenium form when
heated to decomposition.
Hazardous Polymerization:Will not occur.
Incompatibilities:Strong oxidizers, strong acids, and a wide range of
other materials.
Conditions to Avoid:Moisture and incompatibles.
Toxicological Data:Oral Rat LD50: 6700 mg/kg.
Investigated as a tumorigen and a reproductive effector.
Carcinogenicity:
EPA / IRIS classification: Group D1 - Not classifiable as a human carcinogen.
Environmental Fate:No information found.
Environmental Toxicity:No information found.
Whatever cannot be saved for recovery or recycling should be handled as hazardous waste and sent to a RCRA approved waste facility. Processing, use or contamination of this product may change the waste management options. State and local disposal regulations may differ from federal disposal regulations. Dispose of container and unused contents in accordance with federal, state and local requirements.
Not regulated.
NILE CEHMCIALS provides the information contained herein
in good faith but makes no representation as to its comprehensiveness or
accuracy. This document is intended only as a guide to the appropriate
precautionary handling of the material by a properly trained person using this
product. Individuals receiving the information must exercise their independent
judgment in determining its appropriateness for a particular purpose. NILE
CHEMICALS MAKES NO REPRESENTATIONS OR WARRANTIES, EITHER EXPRESS OR IMPLIED,
INCLUDING WITHOUT LIMITATION ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE WITH RESPECT TO THE INFORMATION SET FORTH HEREIN OR THE
PRODUCT TO WHICH THE INFORMATION REFERS. ACCORDINGLY, NILE CHEMICALS WILL NOT BE
RESPONSIBLE FOR DAMAGES RESULTING FROM USE OF OR RELIANCE UPON THIS INFORMATION.
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