Hardy Diagnostics P99 Contact Plate – D/E (Dey-Engley) Neutralizing Agar, Non-Irradiated (Broad-Spectrum Neutralization), USP 797, 10 Plates

Overview:
Sterile D/E (Dey-Engley) Neutralizing Agar contact plate designed for the broad-spectrum neutralization of disinfectants and cultivation of microorganisms from environmental surfaces in compounding and cleanroom settings.
Packaged 10 plates per sleeve.

Key Features:

• Medium: D/E (Dey-Engley) Neutralizing Agar – formulated for rapid neutralization of disinfectant residues including quaternary ammonium compounds, chlorine, phenolics, iodophors, formaldehyde, and glutaraldehyde

• Sterility: Non-irradiated; standard sterile packaging for non-aseptic or support cleanroom areas

• Intended Use: Surface and personnel monitoring after routine cleaning and sanitization where disinfectant carryover could inhibit microbial recovery

• Plate Type & Size: 15 × 65 mm Lok-Tight™ contact plate with raised agar surface for direct sampling

• Storage: 2–8 °C; do not freeze

• Shelf Life: 6 months from manufacture (check label)

• Packaging: 10 plates per sleeve (case of 100 also available)

Regulatory:

• USP <797> compliant

• Recommended for 503A pharmacies and cleanroom support zones where broad-spectrum disinfectants are used

Compare to:
P34 – TSA with Lecithin and Tween (non-irradiated), for general bacterial monitoring in non-oxidizing environments.

💡 Recommended Use in Compounding Pharmacies

• Choose P99 (D/E Agar) for monitoring areas sanitized with aggressive or mixed disinfectants.

• Use alongside TSA (P34 or P365) and SabDex (P36) plates for comprehensive bacterial and fungal environmental monitoring under USP <797>.

Design Features:

• Rodac™-Style Contact Plate: 15 × 65 mm plate for surface monitoring featuring the Lok-Tight™ locking lid that secures firmly to the base.

• Friction Lid: Keeps lid in place before sampling.

• Lok-Tight™ Locking Lid: Ensures secure closure post-sampling and during transport.

• Molded Grid: Each plate has a molded counting grid to aid colony enumeration.

• Certificate of Analysis: Available online for each lot.

Sampling Procedure (3 Easy Steps):

1. Remove lid.

2. Gently press plate to surface without twisting or sliding.

3. Twist clockwise until frosted bands align to lock lid in place.