CAG Company Bacteriological Agar Quality Standard: A Glimpse into Our Benchmarks

CAG Company Bacteriological Agar Quality Standard: A Glimpse into Our Benchmarks

Maintaining the highest purity and performance in bacteriological agar is crucial for reliable microbiology results. At CAG, we adhere to stringent, transparent quality standards. Here’s a look at our key testing parameters:

I. Physicochemical Specifications

Parameter	Specification
Moisture	≤ 5%
Turbidity (NTU)	≤ 8
Gel Strength	900–1000 g/cm²
pH	6.0–7.5
Stability at 48°C (4 hours) water bath	No gel formation or flocculation
Heat-Resistant Bacteria Test (55°C, 72 hours)	No growth of thermophilic bacteria
Phosphate Precipitation Test	No precipitation

Sterilization Operation Heat-Resistant Bacteria Test (55°C, 72 hours) ( Failed Sample ）

Stability at 48°C (4 hours) water bath ( Failed Sample ） Phosphate Precipitation Test ( Failed Sample ）

II. Microbiological Performance

Test Strain	Acceptance Criteria
Escherichia coliATCC 25922	Pass
Staphylococcus aureusATCC 6538	Pass
Pseudomonas aeruginosaATCC 27853	Colonies must be round, regular, and show no spreading
Bacillus subtilisATCC 6633	Pass
Streptococcus pneumoniaeCMCC(B) 31001	Pass
Beta-hemolytic StreptococcusATCC 21059	Colonies must be uniform in size
Candida albicansCMCC(F) 98001	Pass

Why This Matters:

Consistency – Tight control of gel strength and pH ensures reproducible media performance.
Clarity – Low turbidity provides better visibility for colony observation.
Stability – No gelling or flocculation at 48°C confirms excellent thermal stability.
Microbiological Purity – Rigorous testing against key ATCC strains ensures reliable growth without interference.

This is how we support labs in achieving accurate, dependable microbial results—batch after batch.

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