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Carbide Lime Data Sheet

Product Name:Calcium Carbide Lime
Chemical Name:Calcium Hydroxide
Formula:Ca(OH)2
Chemical Family:Metal Hydroxide
Use:arious chemical and industrial uses such as pH control, industrial water and sewage treatment, stabilization and agricultural.
Synonyms:Carbide sludge, generator slurry, lime slurry, carbide lime, lime sludge, lime hydrate, calcium hydrate, hydrated lime, lime water, slaked lime.
NFPA Fire:0
NFPA Health:1
NFPA Reactivity:0
NFPA Special Hazard:
HMIS Fire:0
HMIS Health:1
HMIS Reactivity:0
Mixture:Yes
Acute:No
Chronic:No
Fire:No
Reactive:No
Sudden Release Pressure:No
Ingredients - Composition Information
Component:Calcium hydroxide Calcium carbonate
CAS No.1305-62-0 1317-65-3
Percent (by weight)92.5 92.5
1.8 1.8
ACGIH - STEL5 mg/m3 10 mg/m3
Emergency Overview
Danger:May cause skin and eye irritation and burns.
Potential Health Effects Information
Inhalation:Irritating to respiratory tract. Experienced as nausea, vomiting, cough, excess sputum, and chest discomfort. May cause pulmonary edema.
Eye:Exposure may cause severe irritation, experienced as pain, excess tearing, conjunctival edema and hemorrhage, corneal edema and opacification.
Skin:Exposure may cause irritation, seen as redness, with possible swelling
Ingestion:Exposure can cause burns to mouth, throat, and digestive tract.
Chronic Effects:None established.
Medical Conditions Aggravated By OverexposureInhalation may aggravate asthma and inflammatory or fibrotic pulmonary disease.
Carcinogenicity:Calcium hydroxide is not listed by NTP, OSHA or IARC.
First Aid Measures
Inhalation:Remove to fresh air. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get immediate medical attention
Eye:Immediately flush with plenty of water and continue flushing for at least fifteen minutes. It may be necessary to physically remove solid particles with a swab. See a physician, preferably an ophthalmologist, immediately.
Skin:Remove contaminated clothing. Wash skin twice with soap and water. Wash clothing before reuse.
Ingestion:Give two glasses of water. Do not induce vomiting. Call a physician.
Notes To Physician:Use of acidics to neutralize swallowed contents is contraindicated. Use of an EDTA (ethylenediamine tetraacetic acid) solution for rinsing the eyes may help to remove solid particles of the material and relieve some corneal opacification
Fire Fighting Measures
Flash Point:Not applicable
Auto ignition:Not applicable
Flammable Limits - Lower: Not applicable
Flammable Limits - Upper:Not applicable
Extinguishing Media:Calcium hydroxide cannot catch fire.
Fire Fighting Instructions:None
Fire And Explosion HazardsThis material is a co-product from acetylene generation. A limited amount of acetylene temporarily remains in solution in the carbide lime slurry at the time of discharge from the generation process. With subsequent agitation from handling and retention in open vessels, the acetylene evolves from solution. A combustible gas mixture could possibly form as a result of the acetylene released into the surrounding air. Acetylene is an extremely flammable gas, which forms explosive mixtures with air and oxidizing agents.
Hazardous Combustion Products:None known.
Sensitivity To Static Discharge: Not applicable.
Sensitivity To Mechanical Impact:Not applicable.
Handling and Storage
Storage:Store in a clean, ventilated area. Isolate incompatible materials. Post "NO SMOKING" or "NO OPEN FLAMES" signs. Accumulations of acetylene after its release from the slurry, or from unreacted carbide which continues to generate acetylene, can be ignited by any ignition source. All electrical equipment used in or around carbide lime handling or storage areas should comply with the requirements of the National Electrical Codes.
Handling:Consumption of food or beverages should be prohibited in the work area. Access to storage and handling areas should be limited to trained authorized, personnel only. Maintenance in carbide lime areas should only be started after the atmosphere has been checked to ensure that explosive conditions do not exist
When Used In Welding Or Cutting:Read and understand the manufacturer's instructions and the precautionary label on the products. See American National Standard Institute (ANSI) Z49.1 Safety in Welding and Cutting published by the American Welding Society, P.O. Box 351040, Miami, Florida 33135 and National Fire protection Association (NFPA) 51 Oxygen Fuel Gas Welding and Cutting.
Exposure Control - Personal Protection
Engineering Controls:
Ventilation:Use local exhaust and/or forced ventilation to reduce dust concentrations, if any, to below the exposure limit.
Physical and Chemical Properties
Physical State:Solid or Liquid
Color:White-gray
Odor:Odorless, dust inhalation may be irritating. Slightly bitter, alkaline taste. There maybe a slight garlic-like odor present in fresh carbide lime hydride due to minute amounts of dissolved acetylene. The odor dissipates quickly when exposed to air
Molecular Weight:74.1
Boiling Point:1076°F (580°C) Disassociates to form water and calcium oxide.
Specific Gravity:2.24
Freezing/Melting Point:4658°F (2570°C) for calcium oxide.
Vapor Pressure:Not applicable
Vapor Density:Not applicable
Water Solubility:.185g/100 cc water
Expansion Ratio:Not Applicable
pH:12.454 @ 25°C (77°F)
Odor Threshold:Not applicable
Evaporation Rate: Not Applicable
Coefficient Of Water/Oil Distribution:Not applicable
Stability and Reactivity
Chemical Stability:Stable
Conditions To Avoid:None currently known.
Incompatibility With Other Materials:Acidic material, organic nitro compounds, maleic anhydride, phosphorus, and copper.
Hazardous Decomposition Products:Calcium oxide (formed when heated above 1076°F (580°C)).
Hazardous Polymerization:Will not occur
Disposal Considerations
Waste Disposal Method:Recovered lime can be collected and reused for many applications such as water treatment, road stabilization, and acid neutralization. When disposal becomes necessary, dispose in accordance with federal, state, and local government regulations. Consult environmental regulatory agencies for guidance on acceptable disposal practices.