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Chemicals >> Caustic Soda Lye/Flake
Caustic Soda Lye/Flake
Product Identification
Synonyms: Caustic soda; lye; sodium hydroxide solid; sodium hydrate
CAS No.: 1310-73-2
Molecular Weight: 40.00
Chemical Formula: NaOH
Product Codes:
J.T. Baker: 1508, 3717, 3718, 3721, 3722, 3723, 3728, 3734, 3736, 5045, 5565
Mallinckrodt: 7001, 7680, 7708, 7712, 7772, 7798
Composition/Information on Ingredients
Ingredient CAS No Percent Hazardous
--------------------------------------- ------------ ------------ ---------
Sodium Hydroxide 1310-73-2 99 - 100% Yes
Hazards Identification
Emergency Overview
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POISON! DANGER! CORROSIVE. MAY BE FATAL IF SWALLOWED. HARMFUL IF INHALED.
CAUSES BURNS TO ANY AREA OF CONTACT. REACTS WITH WATER, ACIDS AND OTHER
MATERIALS.
SAF-T-DATA(tm) Ratings (Provided here for your convenience)
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Health Rating: 4 - Extreme (Poison)
Flammability Rating: 0 - None
Reactivity Rating: 2 - Moderate
Contact Rating: 4 - Extreme (Corrosive)
Lab Protective Equip: GOGGLES & SHIELD; LAB COAT & APRON; VENT HOOD; PROPER
GLOVES
Storage Color Code: White Stripe (Store Separately)
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Potential Health Effects
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Inhalation:
Severe irritant. Effects from inhalation of dust or mist vary from mild
irritation to serious damage of the upper respiratory tract, depending on
severity of exposure. Symptoms may include sneezing, sore throat or runny
nose. Severe pneumonitis may occur.
Ingestion:
Corrosive! Swallowing may cause severe burns of mouth, throat, and stomach.
Severe scarring of tissue and death may result. Symptoms may include
bleeding, vomiting, diarrhea, fall in blood pressure. Damage may appear days
after exposure.
Skin Contact:
Corrosive! Contact with skin can cause irritation or severe burns and
scarring with greater exposures.
Eye Contact:
Corrosive! Causes irritation of eyes, and with greater exposures it can
cause burns that may result in permanent impairment of vision, even
blindness.
Chronic Exposure:
Prolonged contact with dilute solutions or dust has a destructive effect
upon tissue.
Aggravation of Pre-existing Conditions:
Persons with pre-existing skin disorders or eye problems or impaired
respiratory function may be more susceptible to the effects of the
substance.
First Aid Measures
Inhalation:
Remove to fresh air. If not breathing, give artificial respiration. If
breathing is difficult, give oxygen. Call a physician.
Ingestion:
DO NOT INDUCE VOMITING! Give large quantities of water or milk if available.
Never give anything by mouth to an unconscious person. Get medical attention
immediately.
Skin Contact:
Immediately flush skin with plenty of water for at least 15 minutes while
removing contaminated clothing and shoes. Call a physician, immediately.
Wash clothing 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.
Note to Physician:
Perform endoscopy in all cases of suspected sodium hydroxide ingestion. In
cases of severe esophageal corrosion, the use of therapeutic doses of
steroids should be considered. General supportive measures with continual
monitoring of gas exchange, acid-base balance, electrolytes, and fluid
intake are also required.
Fire Fighting Measures
Fire:
Not considered to be a fire hazard. Hot or molten material can react
violently with water.
Can react with certain metals, such as aluminum, to generate flammable
hydrogen gas.
Explosion:
Not considered to be an explosion hazard.
Fire Extinguishing Media:
Use any means suitable for extinguishing surrounding fire. Adding water to
caustic solution generates large amounts of heat.
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.
Accidental Release Measures
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. Do
not flush caustic residues to the sewer. Residues from spills can be diluted
with water, neutralized with dilute acid such as acetic, hydrochloric or
sulfuric. Absorb neutralized caustic residue on clay, vermiculite or other
inert substance and package in a suitable container for disposal.
US Regulations (CERCLA) require reporting spills and releases to soil, water
and air in excess of reportable quantities. The toll free number for the US
Coast Guard National Response Center is (800) 424-8802.
Handling and Storage
Keep in a tightly closed container. Protect from physical damage. Store in a
cool, dry, ventilated area away from sources of heat, moisture and
incompatibilities. Always add the caustic to water while stirring; never the
reverse. 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. Do not store with aluminum or magnesium. Do not mix
with acids or organic materials.
Physical and Chemical Properties
Appearance:
White, deliquescent pellets or flakes.
Odor:
Odorless.
Solubility:
111 g/100 g of water.
Specific Gravity:
2.13
pH:
13 - 14 (0.5% soln.)
% Volatiles by volume @ 21C (70F):
0
Boiling Point:
1390C (2534F)
Melting Point:
318C (604F)
Vapor Density (Air=1):
> 1.0
Vapor Pressure (mm Hg):
Negligible.
Evaporation Rate (BuAc=1):
No information found.
Other Information
NFPA Ratings: Health: 3 Flammability: 0 Reactivity: 1
Label Hazard Warning:
POISON! DANGER! CORROSIVE. MAY BE FATAL IF SWALLOWED. HARMFUL IF INHALED.
CAUSES BURNS TO ANY AREA OF CONTACT. REACTS WITH WATER, ACIDS AND OTHER
MATERIALS.
Label Precautions:
Do not get in eyes, on skin, or on clothing.
Do not breathe dust.
Keep container closed.
Use only with adequate ventilation.
Wash thoroughly after handling.
Label First Aid:
If swallowed, DO NOT INDUCE VOMITING. Give large quantities of water. Never
give anything by mouth to an unconscious person. In case of contact,
immediately flush eyes or skin with plenty of water for at least 15 minutes
while removing contaminated clothing and shoes. Wash clothing before reuse.
If inhaled, remove to fresh air. If not breathing give artificial
respiration. If breathing is difficult, give oxygen. In all cases get
medical attention immediately.
Product Use:
Laboratory Reagent.
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