Пленки для закрывания лабораторной посуды

Parafilm M®

Лента лабораторная Parafilm M® 4дюйма х 125футов (~98мм х 40м)
Цена 28 USD за рулон

Film Performance Characteristics

Permeability Characteristics:

• Oxygen: 150cc/mІ/24 hours at 73°F and 50% RH
• Carbon Dioxide: 400cc/mІ/24 hours at 73°F and 50% RH

Water Vapor:

• Flat: .88g/mІ/24 hours at 100°F and 90% RH versus desiccant
• Creased: same as flat
• Note: Because of low water permeability and the insensitivity of this material to moisture vapor, it is unlikely that differences in relative humidity (RH) will make a difference in either the oxygen or the carbon dioxide permeability.

Effects of Common Reagents:

• Hydrochloric acid conc. (12N) dil. (5N) - no apparent effect in 24 hours
• Sulphuric acid conc. (36N) dil.(5N) - no apparent effect in 24 hours
• Nitric acid conc. (16N) dil. (5N) - no apparent effect in 24 hours
• Sodium hydroxide conc. (22%) - no apparent effect in 24 hours
• Ammonium hydroxide conc. (28% NH3) - no apparent effect in 24 hours
• Potassium permanganate:
– 5%: no apparent effect except permanent dark brown coloration in 18 hours
– 0.1%: same as 5% but slightly less color
Iodine solution 0.1N: no effect except brown staining in 18 hours
• Salt (NACL) solution 20%: no apparent effect in 24 hours
• Carbon tetrachloride / chloroform / ethyl ether: began to dissolve the film on contact
• Ethyl Alcohol 95%: no apparent effect except some face whitening in 24 hours
• Isopropyl alcohol 99%: no apparent effect in 24 hours

Film becomes soft and sticky at about 130°F to 150°F (68°C)

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