Caustic Soda Lye

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Trade Marks and Synonyms (if any) Caustic Soda Lye, Sodium Hydroxide solution
Chemical Names and Synonyms Sodium Hydroxide solution 45-50% , Caustic Soda solution ,
Lye solution, Sodium Hydrate solution , White caustic solution
Physical Form Clear, colourless liquid, odourless
Molecular Formula
Molecular Weight
NaOH
40.00

Sodium hydroxide (NaOH), also known as lye and caustic soda, is an inorganic compound. It is a white solid and highly caustic metallic base and alkali of sodium which is available in pellets, flakes, granules, and as prepared solutions at a number of different concentrations. Sodium hydroxide forms an approximately 50% (by weight) saturated solution with water.

Sodium hydroxide is soluble in water, ethanol, and methanol. This alkali is deliquescent and readily absorbs moisture and carbon dioxide in air.

Sodium hydroxide is used in many industries, mostly as a strong chemical base in the manufacture of pulp and paper, textiles, drinking water, soaps and detergents and as a drain cleaner. Worldwide production in 2004 was approximately 60 million tonnes, while demand was 51 million tonnes.

Synonyms

Caustic ; Liquid caustic soda ; Lye solution ; Soda lye ; Sodium hydroxide

Molecular Formula HONa
Molecular weight 40

Specifications
Appearance Clear , colourless liquid
pH Strong base>14
Strength 47% w/w maximum
Fe content 25ppm maximum
Chloride as NaCL 0.05% w/w maximum

Description
Caustic soda lye is a clear colourless liquid .

Applications
Intermrdiate for chemicals

Packaging
Sodium hydroxide is avaliable in tankers . Other packaging may be considered on request .

Storage and handling

Store in a tightly closed container in a designated area with adequate ventilation . Keep away from acids . Caustic soda lye is corrosive in nature . Proper handling procedures must be followed to prevent vigorous boiling , splattering or violent eruption of the diluted solution . Always add caustic soda lye to water and provide agitation . Refer to the Safety Data Sheet (SDS) for detailed information on storage and handling .

Caustic soda lye 48 %
Bulk Chemicals and Intermediates | Technical Data Sheet

Safety

Wear all the necessary personal equipment (PPE) . Ensure adequate ventilation . Prevent breathing of mist or vapours , Prevent contact with skin , eyes and clothing . Always refer to the SDS for detailed information on safety .

First aid

Eye Contact : Immediately flush eyes with plenty of water , occasionally lifting the upper and lower eyelids and rotating the eyeballs , Continue flushing the eyes for at least 5 minutes .

Skin contact : Remove contaminated clothing and immediately wash skin for minimum of 15 minutes . Call a physician .
Ingestion : Do not induce vomiting . If the preson is conscious , give 2 or more glasses of water . If unconscious , never give anything by mouth . Call a physician immediately .

Inhalation : Shift the affected person to fresh air . If the person is not breathing give artificial respiration . Call a physician .

Spills and disposal

Do not touch the spilled material . Stop leakage if possible without personal risk . absorb spillage with sand or other non -combustible materials (s) . Collect spilled material in appropriate containers for disposal . More containers away from the site to a safe area . Isolate hazardous area and restrict | deny entry of personnel . Do not dispose of waste to a sewer system or normal garbage . Waste must be disposed of in accordance with federal , state or local regulation , as applicable .

HAZARD IDENTIFICATION
Main Risk
Contact with skin Causes burns
Contact with eyes Severe damage
Safety Phrases Keep out of reach of children. In case of contact with eye, wash
immediately with plenty of water for 15-20 minutes. Seek
medical aid. Remove contaminated clothes & shoes. Wash
affected area with plenty of water. If inhaled, remove the victim
to fresh air area & support respiration. Seek Medical Aid
immediately for all types of exposure.
4. PHYSICAL AND CHEMICAL PROPERTIES
Appearance and Odour Clear, colourless and odourless liquid
pH Approx 14
Specific Gravity 1.4 – 1.6 at 25 °C
Melting Point 12 °C
Boiling Point 140 °C
Flash Point Not applicable
Auto ignition Not applicable
Flammable Limit Not applicable
Vapour Pressure (mm Hg) Not applicable
Solubility in Water Infinite
Solubility in Organic Solvents Soluble in alcohol, Methanol and Glycerol
Oxidizing /Explosive Properties No

STABILITY AND REACTIVITY
Stability As supplied it is stable at normal temperature & pressure. Found to be
slightly reactive
Conditions to avoid Avoid contact with acid, flammable liquids, organic halogen
compounds, nitro compounds and amphoteric metals such as
aluminum, magnesium, and zinc.
.
Material to avoid Acids, organic halogen compounds, contact with aluminium,
magnesium, zinc & other amphoteric metals, nitro compounds and
flammable liquids
Reactivity
Air Reactive
Water Not applicable
Acids Reacts violently with acids
Alkalis Reacts with ammonium salts liberating ammonia gas
Hazardous Decomposition Products Oxides of carbon and nitrogen, smoke & other toxic fumes

TOXICITY DATA
Short term effects when:
In contact with skin Severe Irritation, burns
In contact with eyes Severe Irritation, burns, eye damage, blindness
Inhalation Severe Irritation, burns, pulmonary edema
Ingestion Severe Irritation, burns, nausea, vomiting
Long term effects when:
In contact with skin Dermatitis
In contact with eyes Visual disturbances
Inhalation May cause lung disorders. Lesions of the nasal septum, pulmonary
edema, pneumonitis and emphysema.
Ingestion Swallowing can result in nausea, vomiting, diarrhea, abdominal pain,
swelling of the larynx and subsequent suffocation, perforation of the
gastrointestinal tract , cardiovascular collapse and coma.

FIRST AID MEASURES
Skin Contact Wash the affected area with plenty of water.
Eye Contact Wash with plenty of water for 15-20 minutes.
Inhalation Remove the victim from exposure. Support respiration, gives oxygen
if necessary
Ingestion Give water or milk followed by dilute vinegar or fruit juice. Do not
induce vomiting.
Further Medical Advice Seek medical aid immediately for all exposures.

PERSONAL PROTECTION
General Precaution Provide local exhaust ventilation where dust or mist may be
generated. Ensure applicable exposure limits.
Ventilation Requirements Provide local exhaust ventilation where dust or mist may be
generated. Ensure applicable exposure limits.
Respiratory Protection A NIOSH approved respirator with N95 (dust, fume, mist) filters
may be permissible under certain circumstances where air borne
concentrations are expected to exceed exposure limits , or when
symptoms have been observed that are indicative of over-exposure.
A half face piece air-purifying respirator may be used in
concentrations up to 10X the acceptable exposure level and a full
face piece air-purifying respirator may be used in concentrations upto
50X the acceptable exposure level.
Supplied air should be used when the level is expected to be above
50X the acceptable level , or when there is a potential for
uncontrolled release.
A respiratory protection program that meets 29 CFR 1910.134 must
be followed whenever workplace conditions warrant use of a
respirator.

Protective Clothing Wear protective clothing to minimize skin contact. When potential
for contact with wet material exists, wear Tychem (R) SL or a
similar chemical protective suit . When potential for contact with dry
material exists, wear disposable overalls such as Tyvek (R)
Eye Protection
Gloves
Protective Material Types
Wear chemical resistant safety goggles if eye contact is likely. When
wet mixing, wear splash resistant safety goggles with a face shield.
Provide an emergency eye wash fountain and quick drench.
Wear suitable gloves, Discard contaminated leather goods. When wet
mixing, wear chemical resistant gloves such as butyl rubber, natural
rubber, neoprene or nitrile.
Butyl rubber, canvas, leather, natural rubber, neoprene, nitrile,
Tychem (R) and Tyvek (R).

HANDLING AND STORAGE
Handling Store in a cool, dry and well-ventilated place. Keep containers
closed. Keep away from heat, sparks and flames. Use only with
adequate ventilation. Avoid contact with eyes, skin or clothing.
Storage Store and handle in accordance with all current regulations and
standards. Keep container tightly closed and properly labeled. Do not
store in aluminium container or use aluminium fittings or transfer
lines , as flammable hydrogen gas may be generated. Keep separated
from incompatible substances. The filled container is kept on
wooden pellets.

SPILLAGE/ACCIDENTAL RELEASE
Spillage Do not touch spilled material. Prevent it entering sewers. Dry
manual lifting of the spilled material is suggested without making
dust Wash the surface with plenty of water and soap.
Personal Precautions Avoid generation of dust. Avoid eyes & skin contact. Avoid
inhalation. Avoid ingestion. Wear appropriate personal protective
equipments.
Environmental Precautions Prevent contamination of soil and water.
WASTE DISPOSAL
Waste Disposal Seal all waste in airtight plastic bags for eventual disposal as per the
guidelines of National/Regional Regulations.
Packing materials gets contaminated. Before disposal wash
thoroughly with water and then dispose off by appropriate methods in
accordance with National / Regional requirement.

ENVIRONMENTAL INFORMATION
Bio – Accumulation No bio-accumulation
Biodegradability
Persistence
This material is inorganic and not subject to biodegradation.
This material will exist in the dissociated state
Toxicity This material has exhibited slight toxicity to terrestrial organisms and
moderate toxicity to aquatic flora & fauna.
Mobility If released in water the product is highly soluble and contaminates the
water resources.

Risk Phrases R20/R21/R22: Harmful by inhalation, in contact with skin and if
swallowed.
R34: Causes burns
R36/37/38: Irritating to eyes ,respiratory system & skin..
R50/53: Very toxic to aquatic organisms, may cause long term
adverse effects
R41: Risk of serious damage to eyes.
R54/R55/R56: Toxic to flora, fauna & soil organisms
R66: Repeated exposure may cause skin dryness or cracking
Safety Phrases S2: Keep out of the reach of children.
S14/15: Keep away from 1,2,4,5-tetrachlorobenzene and acetic acid
and its derivatives & heat.
S22/23: Do not breathe dust, do not breathe gas /fumes/vapor/spray
S24/S25:Avoid contact with skin, eyes.
S26:In case of contact with eyes ,rinse immediately with plenty o
water and seek medical advice.
S27: Take off immediately all contaminated clothing.
S28: After contact with skin ,wash immediately with plenty of water
and soap.
S36/37/39: Wear suitable protective clothing, gloves and eye/face
protection.
S45: In case of accident or if you feel unwell, seek medical advice
immediately and show the label where possible
S46:If swallowed, seek medical advice immediately and show this
label or container.
S61: Avoid release to the environment
S62: If swallowed, do not induce vomiting; seek medical advice
immediately and show the label.

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