CAS Registry No.

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: 1310-73-2 Other Names: Caustic soda, Lye Main Uses: Manufacture of other chemicals, và used in many manufacturing processes. Appearance: Colourless - white solid. Odour: Odourless

Canadian TDG: UN1823, UN1824


*
Class E

Emergency Overview: Colourless - trắng solid. Odourless. Will not burn. Highly Reactive. Incompatible with many common chemicals. Reacts violently with water. Tương tác with metals liberates flammable hydrogen gas. EXTREMELY CORROSIVE. Causes severe skin burns và eye damage.


Main Routes of Exposure: Skin contact. Eye contact.

Inhalation: Not expected to be an inhalation hazard unless it becomes an airborne dust or mist. Can cause severe irritation of the nose and throat. Skin Contact: CORROSIVE. Liên hệ can cause pain, redness, burns, and blistering. Permanent scarring can result. A severe exposure can cause death. Burns may not be immediately painful; onset of pain may be delayed minutes lớn hours. Eye Contact: CORROSIVE. Liên hệ causes severe burns with redness, swelling, pain and blurred vision. Permanent damage including blindness can result. Ingestion: Can burn the lips, tongue, throat và stomach. Symptoms may include nausea, vomiting, stomach cramps & diarrhea. Can cause death. Effects of Long-Term (Chronic) Exposure: Conclusions cannot be drawn from the limited studies available. Can cause dry, red, cracked skin (dermatitis) following skin contact. Carcinogenicity: Not known lớn cause cancer.

International Agency for Research on Cancer (IARC): Not specifically designated. American Conference for Governmental Industrial Hygienists (ACGIH): Not specifically designated.

Teratogenicity / Embryotoxicity: Not known lớn harm the unborn child. Reproductive Toxicity: Not known khổng lồ be a reproductive hazard. Mutagenicity: Not known khổng lồ be a mutagen.

What are first aid measures for sodium hydroxide?


Inhalation: Move victim to lớn fresh air. Hotline a Poison Centre or doctor if the victim feels unwell.

Skin Contact: Avoid direct contact. Wear chemical protective clothing if necessary. Quickly take off contaminated clothing, shoes and leather goods (e.g. Watchbands, belts). Quickly and gently blot or brush away excess chemical. Immediately flush with lukewarm, gently flowing water for at least 60 minutes. Do NOT INTERRUPT FLUSHING. If it can be done safely, continue flushing during transport to lớn hospital. Immediately call a Poison Centre or doctor. Treatment is urgently required. Transport lớn a hospital. Thoroughly clean clothing, shoes & leather goods before reuse or dispose of safely.

Eye Contact: Avoid direct contact. Wear chemical protective gloves if necessary. Quickly and gently blot or brush chemical off the face. Immediately flush the contaminated eye(s) with lukewarm, gently flowing water for at least 60 minutes, while holding the eyelid(s) open. If a tương tác lens is present, vày NOT delay flushing or attempt to remove the lens. Take care not khổng lồ rinse contaminated water into the unaffected eye or onto the face. Immediately call a Poison Centre or doctor. Treatment is urgently required. Transport lớn a hospital.

Ingestion: Have victim rinse mouth with water. If vomiting occurs naturally, have victim lean forward to lớn reduce risk of aspiration. Have victim rinse mouth with water again. Immediately điện thoại tư vấn a Poison Centre or doctor. Treatment is urgently required. Transport to lớn a hospital.

First Aid Comments: All first aid procedures should be periodically reviewed by a doctor familiar with the chemical & its conditions of use in the workplace.


What are fire hazards và extinguishing truyền thông for sodium hydroxide?


Flammable Properties: Does not burn.

Suitable Extinguishing Media: Not combustible. Use extinguishing agent suitable for surrounding fire

Unsuitable Extinguishing Media: Carbon dioxide.

Specific Hazards Arising from the Chemical: Contact with water causes violent frothing và spattering. Reacts with metals khổng lồ produce highly flammable hydrogen gas. Closed containers may rupture violently when heated releasing contents. Toxic sodium oxide fumes can be generated at high temperatures.


What are the stability and reactivity hazards of sodium hydroxide?


Chemical Stability: Normally stable. Conditions lớn Avoid: Water, moisture or humidity. Generation of dust. Incompatible Materials: Highly reactive. Reacts violently with: many chemicals, including, water, organic acids (e.g. Acetic acid), inorganic acids (e.g. Hydrofluoric acid), oxidizing agents (e.g. Peroxides), metals (e.g. Aluminum). Corrosive to: aluminum alloys, carbon steel, & other metals. Hazardous Decomposition Products: None known. Possibility of Hazardous Reactions: None known.

What are accidental release measures for sodium hydroxide?


Personal Precautions: Evacuate the area immediately. Isolate the hazard area. Keep out unnecessary and unprotected personnel. Use personal protective equipment as required. Remove or isolate incompatible materials as well as other hazardous materials.

Methods for Containment & Clean-up: Contain và soak up spill with absorbent that does not react with spilled product. Shovel or sweep dry sodium hydroxide for recycling or disposal. Flush spill area. Dike spilled hàng hóa to prevent runoff.


What handling và storage practices should be used when working with sodium hydroxide?


Handling: Before handling, it is important that all engineering controls are operating & that protective equipment requirements và personal hygiene measures are being followed. Only trained personnel should work with this product. Immediately report leaks, spills or failures of the safety equipment (e.g. Ventilation system). Avoid generating vapours or mists. Avoid generating dusts. Use corrosion-resistant tools & equipment. Never showroom water to lớn a corrosive. Always add corrosives slowly khổng lồ COLD water. Never reuse empty containers, even if they appear lớn be clean. Keep containers tightly closed when not in use or empty.

Storage: Store in an area that is: cool, dry, well-ventilated, separate from incompatible materials. Keep amount in storage lớn a minimum. Store in the original, labelled, shipping container. Vent drums lớn prevent pressure buildup. Bởi not handle swollen drums. Get expert advice. Empty containers may contain hazardous residue. Store separately. Keep closed. Contain spills or leaks by storing containers in trays made from compatible materials.



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What are the engineering controls for sodium hydroxide?


Engineering Controls: Use a local exhaust ventilation và enclosure, if necessary, lớn control amount in the air. It may be necessary to lớn use stringent control measures such as process enclosure lớn prevent product release into the workplace. Use a corrosion-resistant exhaust ventilation system separate from other ventilation systems. Exhaust directly lớn the outside, taking any necessary precautions for environmental protection.


What Personal Protective Equipment (PPE) is needed when working with sodium hydroxide?


Eye/Face Protection: Wear chemical safety goggles. A face shield (with safety goggles) may also be necessary.

Respiratory Protection:

Up lớn 10 mg/m3: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode*; OR Any powered air-purifying respirator with a high-efficiency particulate filter*.(APF = 50) Any air-purifying, full-facepiece respirator with an N100, R100, or P100 filter; OR Any self-contained breathing apparatus with a full facepiece; OR Any supplied-air respirator with a full facepiece.

*Causes eye irritation or damage; eye protection needed.

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APF = Assigned Protection Factor

Recommendations apply only to lớn National Institute for Occupational Safety và Health (NIOSH) approved respirators. Refer to lớn the NIOSH Pocket Guide to Chemical Hazards for more information.