70166
Skim Milk Powder
suitable for microbiology
Synonym(s):
Milk powder fat-free
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About This Item
UNSPSC Code:
41106212
NACRES:
NA.74
Recommended Products
biological source
bovine milk
Quality Level
sterility
non-sterile
form
powder
composition
total nitrogen (N), 4.7-6.0%
availability
not available in USA and Canada
impurities
≤1.5% lipid
≥50.0% reducing sugars (as lactose monohydrate)
ign. residue
≤10%
loss
≤5% loss on drying
application(s)
food and beverages
pathogen testing
microbiology
General description
Skim Milk powder is used for the demonstration of coagulation and proteolysis of casein. Skim Milk is sometimes used as a complete medium or as an ingredient in other media used for the propagation of organisms occurring in milk products. The addition of skim milk to any nutrient-rich medium creates favorable conditions for the growth of organisms, which are encountered in milk. The number of bacteria isolated thus is more than the number of organisms isolated on a regular medium. Proteolytic bacteria hydrolyze casein to form soluble nitrogenous compounds indicated as a clear zone surrounding the colonies on the agar medium. Skim milk serves as a good source of casein
Application
Skim Milk Powder is recommended for cultivation and enumeration of microorganisms encountered in dairy industry
Reconstitution
Mix the powder to a smooth paste with a small quantity of distilled water, then gradually add more distilled water until a 10% w/v mixture is obtained. This is equivalent to fresh milk, and may be sterilized by autoclaving for 5 minutes at 121 °C. Care should be taken not to overheat during sterilization, otherwise caramelization will occur.
Other Notes
Sales restrictions may apply
Storage Class Code
11 - Combustible Solids
WGK
WGK 1
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
Personal Protective Equipment
dust mask type N95 (US), Eyeshields, Gloves
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Articles
Culture media provides a habitat with suitable nutrients, energy sources, and certain environmental conditions for the growth of microorganisms. The components of the culture media range from simple sugars to peptones, salts, antibiotics, and complex indicators.
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