- Sommaire,
French
version
-
- On this page : Sodium
silicate (powder), sodium
silicate (solution)
-
-
SODIUM
SILICATE (Powder)
by
Edouard Bastarache
|
-
-
- Identification
-
- Cas Number :
1344-09-8
-
- French Names :
- Silicate de sodium
- Silicate de sodium (ratio
SiO2:Na2O greater than 2,4:1)
-
- English Names :
- Sodium silicate
- Silicic acid, sodium salt
- Sodium
sesquisilicate
-
- Uses and
Sources of Emission
:
-
- Manufacture of soaps and
detergents.
- Fluxing of casting slips in
ceramics.
-
- Physical and
Chemical Properties :
-
- I-Appearance
:
- Powder.
-
- II-Color
:
- White.
-
- III-Odor
:
- Odorless or musty
odor.
-
- IV-pH :
- Approximately
12.7
-
- V-Bulk density
:
- Approximately 90
pounds/ft³
-
- VI-Solubility in water
:
- Soluble in all
proportions.
-
- Stability
and Reactivity :
-
- I-Stability
:
- This material is stable
under all conditions of use and storage.
-
- II-Conditions to avoid
:
- None.
-
- III-Materials to avoid
:
- Generates heat when mixed
with acid. May react with ammonium salt solutions
resulting in evolution of ammonia gas. Flammable
hydrogen gas may be produced on contact with aluminum,
tin, lead, and zinc.
-
- IV-Hazardous
decomposition products :
- Sodium oxide.
-
- Inflammability
and Explosiveness :
-
- I-Inflammability :
- This product is non
flammable.
-
- II- Fire-fighting
equipment :
- The following protective
equipment for fire fighters is recommended when this
material is present in the area of a fire:
- - chemical
goggles,
- - body-covering protective
clothing,
- - chemical resistant gloves,
- - rubber boots.
-
- III-Combustion Product
:
- Sodium Oxide.
-
- IV-Materials to Avoid
:
- This product is incompatible
with these substances:
- - acids,
- - carbon dioxide.
- When mixed with an acid it
generates heat. Can react with ammonium salt solutions
and release gaseous ammonia.
- Flammable hydrogen gas can
be produced on contact with :
- - aluminium,
- - tin,
- - lead,
- - Zinc
-
- Toxicology
-
- I-Experimental Toxicology
:
- DL50 :
- Rat (Oral): 1 280 mg/kg.
- Mouse (Oral): 2 400 mg/kg.
- Rat (Oral): 1 600 mg/kg.
-
- II-Absorption :
- This product is absorbed by
the respiratory and the digestive tracts.
-
- III-Acute Effects :
- A-Ocular Contact :
- Severe irritation or
corrosion.
- B-Skin Contact :
- Severe irritation or
corrosion.
- C-Inhalation :
- Severe irritation or
corrosion.
- D-Ingestion :
- Severe irritation or
corrosion.
- Nausea, vomiting, diarrhoea,
burns of the mouth, oesophagus and stomach.
- Death is possible.
-
- Note : Sodium silicate is
considered corrosive when its ratio SiO2:Na2O is lower
than
- 2.4 for the powdered product
or lower than 1.8 for solutions, otherwise it is
considered irritating.
-
- IV-Chronic Effects :
- Contact
dermatitis.
-
- Effects on Development
:
- No data concerning an effect
on development was found in the consulted documentary
sources.
-
- Effects on
Reproduction :
- No data concerning the
effects on reproduction was found in the consulted
documentary sources.
-
- Data on Mother's milk
:
- There is no data concerning
its excretion or detection in milk.
-
- Cancerogenic Effects
:
- No data concerning a
cancerogenic effect was found in the consulted
documentary sources.
-
- Mutagenic Effects
:
- No data concerning a
mutagenic in vivo or in vitro effect on cells of
mammals was found in the consulted documentary
sources.
-
- First Aid
Measures
-
- I-Eye :
- In case of contact,
immediately flush eyes with plenty of water for at
least 15 minutes. If easy to do, remove contact
lenses, if worn.
- Get medical
attention.
-
- II-Skin :
- In case of contact,
immediately flush skin with plenty of water. Remove
contaminated clothing and shoes.
- Get medical
attention.
-
- III-Inhalation
:
- Remove to fresh air. If not
breathing, give artificial respiration. If breathing
is difficult, give oxygen.
- Get medical
attention.
-
- IV-Ingestion :
- Do not induce vomiting. Seek
medical attention immediately. If the victim is
conscious, give a cup of water.
- Never give anything by mouth
to somebody who is unconscious.
-
- Accidental
Release Measures
-
- I-Personal protection
:
- Wear chemical goggles,
body-covering protective clothing, chemical resistant
gloves, and rubber boots, an approved dust respirator
where dust occurs.
-
- II-Environmental Hazards
:
- Sinks and mixes with water.
High pH of this material is harmful to aquatic
life
-
- III-Small spill cleanup
:
- Carefully shovel or sweep up
spilled material and place in suitable container.
Avoid generating dust. Use appropriate Personal
Protective Equipment
-
- IV-Large spill cleanup
:
- Keep unnecessary people
away; isolate hazard area and deny entry. Do not touch
or walk through spilled material. Carefully shovel or
sweep up spilled material and place in suitable
container. Avoid generating dust.
- Use appropriate Personal
Protective Equipment. In case of contact with water,
prevent runoff from entering into storm sewers and
ditches which lead to natural waterways. Neutralize
contaminated area and flush with large quantities of
water.
- Comply with applicable
environmental regulations.
-
- Handling and
Storage
-
- I-Handling
:
- Do not get in eyes. Avoid
contact with skin and clothing. Avoid breathing dust.
Keep container closed. Promptly clean up
spills.
-
- II-Storage
:
- Keep containers closed.
Store in clean steel or plastic containers. Separate
from acids, reactive metals, and ammonium salts. Do
not store in aluminum, fiberglass, copper, brass, zinc
or galvanized containers. This product can absorb
water from the air. In case of high humidity or
storage for extended periods of time, use plastic bags
to enclose product containers to avoid
caking.
-
- Exposure
Controls/Personal Protection
-
- I-Engineering controls
:
- Use only with adequate
ventilation. Keep containers closed. Safety shower and
eyewash fountain should be within direct
access.
-
- II-Respiratory protection
:
- Use an approved dust
respirator where dust occurs.
-
- III-Skin protection
:
- Wear body-covering
protective clothing and gloves.
-
- IV-Eye protection
:
- Wear chemical
goggles.
-
- Environmental
Fate
-
- This material is not
persistent in aquatic systems, but its high pH when
undiluted or unneutralized is acutely harmful to
aquatic life. Diluted material rapidly depolymerizes
to yield dissolved silica in a form that is
indistinguishable from natural dissolved silica.
- This material does not
bioaccumulate except in species that use silica as a
structural material such as diatoms and siliceous
sponges.
- Where abnormally low natural
silica concentrations exist (less than 0.1 ppm),
dissolved silica may be a limiting nutrient for
diatoms and a few other aquatic algal species.
- However, the addition of
excess dissolved silica over the limiting
concentration will not stimulate the growth of diatom
populations; their growth rate is independent of
silica concentration once the limiting concentration
is exceeded. Neither silica nor sodium will
appreciably bioconcentrate up the food
chain.
-
-
-
-
- Références
:
-
- 1-Occupational
Medicine,Carl Zenz, dernière
édition.
- 2-Clinical Environmental
Health and Toxic Exposures, Sullivan & Krieger;
dernière édition.
- 3-Sax's Dangerous
Properties of Industrial Materials, Lewis C.,
dernière édition.
- 4-Toxicologie
Industrielle et Intoxications Professionnelles,
Lauwerys R. dernière
édition.
- 5-Chemical Hazards of the
Workplace, Proctor & Hughes, 4e
édition.
- 6-CSST-Québec,
Service du Répertoire Toxicologique,
2005
- 7- PQ Corporation, Sodium
Silicate Powder, MSDS, John G. Blumberg,
05/29/02
-
-
-
- On this page :
French
version,
Sodium
silicate (powder),
sodium silicate (solution)
-
SODIUM
SILICATE (Solution)
by
Edouard Bastarache
|
-
-
-
- Product
Identification
-
- Chemical Formula :
Na2O(SiO2)x.(H2O)x
- Synonyms : Water Glass;
Soluble Glass; Silicate of Soda; Egg Preserver
-
- Physical and
Chemical Properties
-
- I-Appearance :
- Clear to cloudy, viscous
liquid.
-
- II-Odor :
- Odorless.
-
- III-Solubility :
- Complete (100%)
-
- IV-Specific Gravity :
- 1.3 - 1.5
-
- V-pH :
- 11 - 12.5
-
- VI-% Volatiles by volume
@ 21C (70F) :
- ca. 70
-
- VII-Boiling Point :
- 102C (216F)
-
- VIII-Vapor Pressure (mm
Hg) :
- 18 @ 20C (68F)
-
- Stability
and Reactivity
-
- I-Stability :
- Stable under ordinary
conditions of use and storage.
-
- II-Hazardous
Decomposition Products :
- Hydrogen
-
- III-Hazardous
Polymerization :
- Will not occur.
-
- IV-Incompatibilities :
- Fluorine, mineral acids,
organic acids, organic materials. May produce hydrogen
gas on prolonged contact with metals. Gels when mixed
with acids.
-
- V-Conditions to Avoid :
- Incompatibles.
-
- Toxicology
-
- Diluted solutions of sodium
silicate are strong alkaline irritants. The solid
sodium silicate is corrosive. Exposure to alkaline
corrosives may result in severe burns depending on the
concentration and duration of exposure. Sodium
silicate is a type of amorphous silica and does not
cause pulmonary silicosis.
-
- I-Acute Effects :
-
- A-Eye Contact :
- A strong alkaline irritant.
Alkaline eye exposures produce severe irritation with
effects similar to those of dilute caustics.
Inflammation or burns with possible damage to the eye
tissues can occur together with tearing and
considerable pain.
-
- B-Skin Contact :
- A strong alkaline irritant.
Causes severe irritation. Symptoms include redness,
itching and pain. Dries to form a glass film which can
cut skin. Solid sodium silicate: Dermal contact with
alkaline corrosives may produce pain, redness, severe
irritation or full thickness burns.
-
- C-Inhalation :
- A strong alkaline irritant.
Inhalation can cause severe irritation of mucous
membranes and upper respiratory tract. Symptoms may
include burning sensation, coughing, wheezing,
laryngitis, shortness of breath, headache, nausea and
vomiting. High concentrations may cause lung damage.
-
- D-Ingestion :
- A strong alkaline irritant.
Causes irritation to the gastrointestinal tract.
Symptoms may include nausea, vomiting and diarrhea.
Solid sodium silicate: Alkaline corrosive ingestion
may produce burns to the lips, tongue, oral mucosa,
upper airway, esophagus and occasionally stomach.
-
- II-Chronic Effects :
- No information
found.
-
- III-Aggravation of
Pre-existing Conditions :
- Persons with pre-existing
skin disorders or impaired respiratory function may be
more susceptible to the effects of the substance.
-
- First Aid
Measures :
-
- I-Eye Contact :
- Immediately flush eyes with
plenty of water for at least 15 minutes, lifting lower
and upper eyelids occasionally. Get medical attention
immediately.
-
- II-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.
-
- III-Inhalation :
- Remove to fresh air. If not
breathing, give artificial respiration. If breathing
is difficult, give oxygen. Get medical attention.
-
- IV-Ingestion :
- If swallowed, DO NOT INDUCE
VOMITING. Give large quantities of water. Never give
anything by mouth to an unconscious person. Get
medical attention immediately.
-
- Fire
Fighting Measures
-
- I-Fire :
- Not considered to be a fire
hazard.
-
- II-Explosion :
- Not considered to be an
explosion hazard.
-
- III-Fire Extinguishing
Media :
- Use any means suitable for
extinguishing surrounding fire.
-
- IV-Special Information :
- In the event of a fire, wear
full protective clothing and approved self-contained
breathing apparatus with full facepiece operated in
the pressure demand or other positive pressure mode.
-
- Accidental
Release Measures
-
- Caution! Floor and other
surfaces may be slippery. Ventilate area of leak or
spill. Wear appropriate personal protective equipment.
- Contain and recover liquid
when possible. Collect liquid in an appropriate
container or absorb with an inert material (e. g.
vermiculite, dry sand, earth), and place in a chemical
waste container.
- Do not use combustible
materials, such as saw dust. Do not flush to
sewer!
-
- Handling and
Storage
-
- 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 (vapors, liquid); observe all warnings and
precautions listed for the product.
-
- Exposure
Controls/Personal Protection
-
- I-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.
-
- II-Personal Respirators
:
- 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.
-
- III-Skin Protection :
- Wear impervious protective
clothing, including boots, gloves, lab coat, apron or
coveralls, as appropriate, to prevent skin contact.
-
- IV-Eye Protection :
- Use chemical safety goggles
and/or a full face shield where splashing is possible.
Maintain eye wash fountain and quick-drench facilities
in work area.
-
- Disposal
Considerations
-
- Whatever cannot be saved for
recovery or recycling should be managed in an
appropriate and approved waste disposal facility.
Processing, use or contamination of this product may
change the waste management options. Dispose of
container and unused contents in accordance with
federal, state and local requirements.
-
-
-
-
- References
:
-
- 1-Occupational
Medicine,Carl Zenz, last edition.
- 2-Clinical Environmental
Health and Toxic Exposures, Sullivan & Krieger;
last edition.
- 3-Sax's Dangerous
Properties of Industrial Materials, Lewis C., last
edition.
- 4-Toxicologie
Industrielle et Intoxications Professionnelles,
Lauwerys R.R. last edition.
- 5-Chemical Hazards of the
Workplace, Proctor & Hughes, 4th
edition
- 6-CSST-Québec,
Service du Répertoire Toxicologique,
2005
- 7- PQ Corporation, Sodium
Silicate Powder, MSDS, John G. Blumberg,
05/29/02
- 8-PQ Corporation, Sodium
Silicate Solution, MSDS, John G. Blumberg,
05/29/02
- 9-Mallinckrodt Baker Inc.
Sodium Silicate Solution, MSDS, 2003
-
-
-
|
|
- Edouard
Bastarache M.D.
- (Occupational
& Environmental
Medicine)
-
- Author
of " Substitutions for raw ceramic
materials "
- Tracy,
Québec, CANADA
- edouardb@colba.net
|
-
-
-
-
-
- Smart2000.fr
le
site dédié aux passionnés de
céramique
-
- Smart2000
- FRANCE sur https://smart2000.fr/
-
- This
entire page Copyright © 2004-2023, All Rights
Reserved.
- Les
textes et les photos restent la
propriété de leur auteurs, ils ne
peuvent être réutilisés sans un
accord préalable. Nous
consulter.
|