Skip to Content
Merck
All Photos(1)

Key Documents

More Documents

1.00415

Millipore

A-1 Medium

GranuCult® prime, suitable for microbiology, for coliforms

Synonym(s):

Coliform culture media

Sign Into View Organizational & Contract Pricing
All Photos(1)

About This Item

UNSPSC Code:
41106213

Agency

US EPA 8368

Quality Level

200

form

medium granules (dehydrated (DCM))

manufacturer/tradename

GranuCult® prime

packaging

pkg of -500 g

storage condition

dry media (Tightly closed)
protect from light

technique(s)

microbiological culture: suitable

color

light brown

pH

6.7-7.1 (25 °C, 31.5 g/L in H2O)

application(s)

food and beverages
microbiology

storage temp.

15-25°C

suitability

coliforms

Related Categories

General description

A-1 Medium is a granulated dehydrated culture medium used to detect fecal coliforms in non-potable and wastewater. Peptone from casein, lactose, and salicin are nutrients and guarantee good growth of microorganisms. Sodium chloride provides osmotic balance. Triton™ X 100 is incorporated as a detergent.

Application

A-1 Medium is a selective culture medium for the detection of fecal coliforms in non-potable and wastewater.

Features and Benefits

  • GranuCult® prime offers superior granulated culture media
  • Safe and sustainable due to reduced risks associated with fine dust and toxic substance inhalation, resulting in a safer work environment
  • Excellent wettability, solubility, and free flowing properties
  • Convenient, with minimal component separation and clumping, even under warm or humid conditions
  • High batch-to-batch reproducibility
  • Prolonged shelf life of up to five years
  • High number of test strains exceeding all regulatory demands
  • Granulation technology allowing many supplements to be included, with no need to add these separately

Analysis Note

Appearance (clearness): clear
Appearance (colour): yellowish to yellow
pH-value (25 °C): 6.7 - 7.1
Growth (Escherichia coli ATCC 25922 (WDCM 00013)): good to very good
Growth (Escherichia coli ATCC 8739 (WDCM 00012)): good to very good
Growth (Enterobacter aerogenes ATCC 13048): none to fair
Growth (Enterococcus faecalis ATCC 19433 (WDCM 00009)): none to fair
Growth (Bacillus subtilis ATCC 6633 (WDCM 00003)): none
Growth (Aeromonas hydrophila ATCC 7966 (WDCM 00063)): none
Gas (Escherichia coli ATCC 25922 (WDCM 00013)): +
Gas (Escherichia coli ATCC 8739 (WDCM 00012)): +
Gas (Enterobacter aerogenes ATCC 13048): none or poor
Gas (Enterococcus faecalis ATCC 19433 (WDCM 00009)): -
Gas (Bacillus subtilis ATCC 6633 (WDCM 00003)): -
Gas (Aeromonas hydrophila ATCC 7966 (WDCM 00063)): -
Incubation: 3 hrs.; 35 °C; aerobic. 19 - 23 hrs.; 44.5 °C.

Footnote

We offer two media types: the superior granulated GranuCult® prime and the cost-efficient powdered NutriSelect® culture media, depending on your needs.
The designations basic, plus, or prime are added to indicate the quality control level, from basic quality control to standard QC plus to prime for full regulatory compliance.

Legal Information

GRANUCULT is a registered trademark of Merck KGaA, Darmstadt, Germany
NutriSelect is a registered trademark of Merck KGaA, Darmstadt, Germany
Triton is a trademark of The Dow Chemical Company or an affiliated company of Dow

Signal Word

Danger

Hazard Statements

H317 - H318 - H410

Hazard Classifications

Aquatic Acute 1 - Aquatic Chronic 2 - Eye Dam. 1 - Skin Sens. 1

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

EU REACH SVHC Candidate List

CAS No.

EU REACH Annex XVII (Restriction List)

CAS No.

EU REACH Annex XIV (Authorisation List)

CAS No.

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

Already Own This Product?

Find documentation for the products that you have recently purchased in the Document Library.

Visit the Document Library

Our team of scientists has experience in all areas of research including Life Science, Material Science, Chemical Synthesis, Chromatography, Analytical and many others.

Contact Technical Service