Chemical Indicators

Delox Chemical Indicators: Real-Time Chemical Verification Instant visual confirmation of H₂O₂ exposure parameters

Delox chemical indicators (CIs) provide immediate visual verification of exposure to hydrogen peroxide vapor, offering an essential process control tool that complements biological validation with real-time chemical monitoring. These indicators respond specifically to the critical conditions of the bio-decontamination process — H₂O₂ concentration, exposure time, and distribution uniformity.

Unlike biological indicators, which require prolonged incubation, Delox chemical indicators deliver instantaneous feedback through an irreversible color change, enabling immediate verification of cycle success and rapid identification of potential vapor distribution issues or process failures.

Technical Specifications

Delox Chemical Indicators
Indicator type	Type 1 – Integrating indicator (ISO 11140-1)
Response parameters	2.3 mg/L at 50°C for 6 minutes
Color change	Brown → Green
Operating temperature	15°C – 30ºC
Relative humidity	20-80% RH
Substrate	Plastic strip
Packaging	Box of 250 units
Shelf life	36 months (room temperature)

Scientific Validation

Sensitivity and Specificity:

Critical concentration: Responds only above the detection threshold
Time integration: Accounts for total exposure (concentration as a function of time)

Applications & Use Cases

Process Control:

Real-time verification: Immediate confirmation of sterilization cycle success
Distribution verification: Verification of the spatial uniformity of vapor distribution
Troubleshooting: Identification of under-exposed areas that may represent weak points
Placement Strategy:
Multiple points: Minimum of 5 points per volume to be decontaminated
Critical locations: Areas most difficult for the vapor to decontaminate. Next to the biological indicators where possible