1338-23-4 Usage
Description
2-Butanone peroxide, also known as MEKP (Methyl Ethyl Ketone Peroxide), is a colorless liquid with high viscosity. It is a strong irritant to skin and tissue and is classified as an organic peroxide. Due to its reactive nature, it is commonly used as an initiator for various industrial applications.
Uses
Used in Manufacturing Industry:
2-Butanone peroxide is used as a hardening agent for fiberglass-reinforced plastics, providing strength and durability to the final product.
Used in Polymerization Process:
2-Butanone peroxide is used as an initiator to initiate the polymerization of ethylene, styrene, vinyl chloride, and other monomers. This application is crucial in the production of various types of plastics and resins.
Used in Curing of Unsaturated Polyester Resins:
2-Butanone peroxide is used as a curing agent for unsaturated polyester resins at room temperature, ensuring a rapid and efficient curing process.
Used in Reactive Free Radical-Generating Chemicals:
2-Butanone peroxide is used as a reactive free radical-generating chemical, which is essential for the curing of unsaturated polyester resins and the manufacture of acrylic resins.
Reactivity Profile
2-Butanone peroxide is a strong oxidizing agent. May be ignited by heat, sparks or flame and undergoes self-accelerating decomposition. Explosive decomposition occurs at 230° F. Sensitive to sunlight. Ignition and/or explosion may occur if mixed with readily oxidizable materials. Reacts with combustible materials such as wood, cloth or organic materials, with chlorine, and with metals (iron, copper and their alloys and aluminum and its alloys). Incompatible with strong oxidizing agents, strong reducing agents, natural rubbers, synthetic rubbers and chemical accelerators. Incompatible with heavy metals, acids and bases.
Hazard
Fire risk in contact with organic materials.Strong irritant to skin and tissue. Liver and kidneydamage.
Health Hazard
Extremely destructive to tissue of the mucous membranes, upper respiratory tract, eyes, and skin. Symptoms of exposure include burning sensation, coughing, wheezing, laryngitis, shortness of breath, headache, nausea, and vomiting.
Health Hazard
MEK peroxide is a strong skin and eye irritantwith moderate acute and subchronic toxicity.Its toxicity is greater than di-t-butylperoxide and benzoyl peroxide. Inhalationof its vapors can cause injury to lungs withsymptoms of gross hemorrhages and hyperemia(Floyd and Stockinger 1958). Exposureto high concentrations may have damagingeffects on the liver and kidney. In humans,ingestion of 30–40 g can be toxic, whichmay cause gastrointestinal pain, nausea, andvomiting.LC50 value, inhalation (mice): 170 ppm/4 hLD50 value, intraperitoneal (rats): 65 mg/kgLD50 value, oral (mice): 470 mg/kgIts carcinogenicity is not yet fully established.It is reported (NIOSH 1986) to causetumor in mice.
Fire Hazard
Behavior in Fire: Explosive.
Safety Profile
Poison by
intraperitoneal route. Moderately toxic by
ingestion and inhalation. Human systemic
effects by ingestion: changes in structure or
function of esophagus, nausea or vomiting,
other gastrointestinal effects. A moderate
skin and eye irritant. Questionable
carcinogen with experimental tumorigenic
data. A shock-sensitive explosive. When
heated to decomposition it emits acrid
smoke and irritating fumes.
Potential Exposure
MEKP is used as a curing agent for
thermosetting polyester resins and as a crosslinking agent
and catalyst in the production of other polymers
storage
MEK peroxide is diluted in a solvent or dispersedin a plasticizer, which greatly reducesits shock sensitivity. It is stored in a refrigeratorin a well-ventilated area and wellseparated from other chemicals. Peroxidewith an active oxygen content >9% maynot be shipped. Diluted material is shippedin metal drums with polyethylene liners orpolyethylene-lined paper bags in woodenboxes.
Shipping
UN3105 Organic peroxide type D, liquid,
Hazard Class: 5.2; Labels: 5.2-Organic peroxide, Technical
Name Required.
Incompatibilities
Forms explosive mixture with air (flash
point varies). MEKP may exist in several different structures; decomposition temperatures may vary. Pure substance is shock-sensitive. Explosive decomposition above
176F/80C (also reported @ 230F/110C). Keep away
from sources of ignition, heat, sunlight. A strong oxidizer.
Violent reaction with strong acids; strong bases; reducing
agents; combustible substances, organic materials; chemical
accelerants; oxides of heavy metals; salts, trace contaminants; amines. May accumulate static electrical charges,
and cause ignition of its vapors. Commercial product is
diluted with 40% dimethyl phthalate, cyclohexane peroxide; or diallyl phthalate to reduce sensitivity to shock.
Waste Disposal
Consult with environmental
regulatory agencies for guidance on acceptable disposal
practices. Generators of waste containing this contaminant
(≥100 kg/mo) must conform to EPA regulations governing
storage, transportation, treatment, and waste disposal.
MEKP may be destroyed by adding 20% NaOH solution
slowly in a quantity about 10 times the weight of MEKP.
Incineration is recommended if NaOH treatment is not
used
Check Digit Verification of cas no
The CAS Registry Mumber 1338-23-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,3,3 and 8 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1338-23:
(6*1)+(5*3)+(4*3)+(3*8)+(2*2)+(1*3)=64
64 % 10 = 4
So 1338-23-4 is a valid CAS Registry Number.
InChI:InChI=1/C8H18O6/c1-5-7(3,11-9)13-14-8(4,6-2)12-10/h9-10H,5-6H2,1-4H3
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