SODIUM HYDROXIDE
SYNONYMS:
AZ
303-A DEVELOPER; AZ 351 DEVELOPER; CAUSTIC SODA; CAUSTIC SODA, BEAD; CAUSTIC
SODA, DRY; CAUSTIC SODA, FLAKE; CAUSTIC SODA, GRANULAR; CAUSTIC SODA, SOLID;
COLEC 302; CUPOSIT CP-74B ELECTROLESS COPPER; EEC No. 011-002-00-6 (solid); EEC
No. 011-002-01-3 (solution); EINECS No. 215-185-5; ELECTROCLEANER 111; ENTEC
313 CORROSION INHIBITOR/DISPERSANT; E N T E C 3 1 8 C O R R O S I O N
INHIBITOR/DISPERSANT; FIDELEX 218 METAL STRIPPER; G-182 ACTIVATOR; HIDROXIDO
SODICO (Spanish); HYDROXYDE de SODIUM (French); KTI DE-3(+); KTI DE-5; KTI
SB-351(+); LEWIS-RED DEVIL LYE; LYE; LYE SOLUTION; METALEX TIN STRIPPER L-2;
METALEX W SPECIAL; MICROPOSIT 303A; MICROPOSIT 351; MICROPOSIT 352; MICROPOSIT
353 DEVELOPER; MICROPOSIT 354 DEVELOPER; NATRIUMHYDROXID (German); PELS;
ROSTRIP M-12; RS-4 STRIPPER, POSITIVE; S-1634; SODA LYE; SODIUM HYDRATE; SODIUM
HYDROXIDE, BEAD; SODIUM HYDROXIDE, DRY; SODIUM HYDROXIDE, FLAKE; SODIUM
HYDROXIDE, GRANULAR; SODIUM HYDROXIDE, SOLID; SODIUM(HYDROXYDE de) (French);
SODIUM HYDROXIDECAUSTIC SODA SOLUTION; SODIUM HYDRATE SOLUTION; SODIUM
HYDROXIDE LIQUID; SODIUM HYDROXIDE SOLUTION; SUNNY SOL 100; SUNNY SOL 150;
ULTRAMAC D-89; WHITE CAUSTIC; WHITE CAUSTIC, SOLUTION
IDENTIFICATION:
CAS:
1310-73-2
DOT ID:
UN1823
(solid); UN1824 (solution)
Hazard Class or Division:
8 (CORROSIVE MATERIAL)
ERG Guide:
154
Formula:
HNaO
RTECS No:
WB4900000
Properties:
Nonflammable
solid flakes, pellets, sticks, cakes solution in water. White to colorless
solid; milky solution. Odorless. Sinks and mixes with water; liberates
sufficient heat to ignite combustible materials. Absorbs moisture from the air.
Uses:
In
electroplating and etching; electrolytic extraction of zinc; oxide coating of metals;
a chemical and metal processing agent.
HEALTH & SAFETY INFORMATION
• IDLH:
10
mg/m3
• Odor threshold:
Not listed; mucous membrane irritation at 2 mg/m3
•
OSHA Table Z-1 Air Contaminant
• NIOSH Criteria Document
: NIOSH 76-105
•
Vapor is a severe eye and respiratory tract irritant. May cause lung edema;
effects may be delayed. Liquid or solid causes severe eye and skin irritation.
Causes second-and third-degree burns on short contact and is very injurious to
the eyes. Long term health effects include possible respiratory tract/lung
damage. Repeated exposure to mists or aerosols can produce a tolerance for its
irritant effects. Low concentrations can defat the skin, causing an irritant
dermatitis with redness, drying, fissuring, and scaling. Cancer of the
esophagus has been reported in patients who have corrosion-induced strictures.
However, it is believed that these cancers were the result of tissue
destruction and scar formation rather than a direct cancer-causing action of
sodium hydroxide.
Exposure Limits:
•
ACGIH TLV: 2 mg/m3 ceiling limit
•
OSHA PEL: 2 mg/m3
•
NIOSH REL: 2 mg/m3 ceiling limit
Respirator:
10
mg/m3:
SA:CF (any
supplied-air respirator operated in a continuous-flow mode.) HiEF (any
air-purifying, full-facepiece respirator with a highefficiency particulate
filter); PAPRDM (any powered, air-purifying respirator with a dust and mist
filter) SCBAF (any self-contained breathing apparatus with a full facepiece)
SAF (any supplied-air respirator with a full facepiece).
Emergency or Planned Entry into
Unknown Concentrations or IDLH Conditions
SCBAF:PD,PP (any self-contained breathing apparatus that has a
full facepiece and is operated in a pressuredemand or other positive-pressure
mode) SAF:PD,PP:ASCBA (any supplied-air respirator that has a full facepiece
and is operated in a pressuredemand or other positive-pressure mode in
combination with an auxiliary self-contained breathing apparatus operated in a
pressure-demand or other positive-pressure mode).
Escape:
HiEF
(any airpurifying, full-facepiece respirator with a highefficiency particulate
filter) SCBAE (any appropriate escape-type, self-contained breathing
apparatus).
Note
: Substance causes eye irritation or damage;
eye protection needed.
Reactivity:
Contact
with water, acids, flammable liquids, and organic halogens, especially
trichloroethylene, may cause fires and explosions. Contact with nitromethane
and similar nitro compounds form shock-sensitive salts. Water contact forms
substantial heat and corrosive fumes. Attacks some plastics, rubber, and
coatings. Corrosive to most metals, especially in the presence of moisture.
Contact with metals such as aluminum, tin, lead, and zinc causes corrosion and
the formation of flammablehydrogen gas.
FIRE INFORMATION
Fire
fighting gear, including SCBA, does not provide adequate protection. If
exposure occurs, remove and isolate gear immediately and thoroughly
decontaminate personnel. Noncombustible solid, but a fire hazard when in
contact with water. If material or contaminated runoff enters waterways, notify
downstream users of potentially contaminated water.
Hazard Classifications:
Health Hazard (Blue)
. . . . . . . . . . . . . . 3
Flammability (Red)
. . . . . . . . . . . . . . . 0
Reactivity (Yellow)
. . . . . . . . . . . . . . . . 1
FIRST AID:
Move
victim to fresh air. Call emergency medical care. Apply artificial respiration
if victim is not breathing. Do not use mouth-to-mouth method if victim ingested
or inhaled the substance; induce artificial respiration with the aid of a
pocket mask equipped with a one–way valve or other proper respiratory medical
device. Administer oxygen if breathing is difficult. Remove and isolate
contaminated clothing and shoes. In case of contact with substance, immediately
flush skin or eyes with running water for at least 20 minutes. For minor skin
contact, avoid spreading material on unaffected skin. Keep victim warm and
quiet. Effects of exposure (inhalation, ingestion, or skin contact) may be
delayed. Ensure that medical personnel are aware of the material(s) involved,
and take precautions to protect themselves.
ENVIRONMENTAL REGULATIONS
•
Clean Water Act: Section 311 Hazardous Substances/RQ (same as CERCLA).
•
EPCRA Section 304: Reportable Quantity (RQ): CERCLA, 1000 lb (454 kg).
•
California LOL: GMNPQ