# Luminol Lux (DD-459)

> Luminol is a chemical used by forensic investigators to find traces of blood. Mixed with an oxidizer such as hydrogen peroxide, it reacts in the presence of the iron in hemoglobin, which acts as a catalyst, and gives off a blue glow, an example of chemiluminescence. Other substances such as bleach and some metals can cause false positives. The footage shows luminol glowing in the dark.

- Department: Science
- First published: 2025-01-14
- Last updated: 2025-01-14
- Permalink: https://detailenjoyer.com/case/luminol-lux/
- Author: Marcus Easterling (DetailEnjoyer), The Detail Department

## Quick facts

- **DD-459-F01**: Forensic blood detection. _(Write-up · Exhibit A (Use))_
- **DD-459-F02**: Hydrogen peroxide. _(Write-up · Exhibit B (Oxidizer))_

## Write-up

Luminol glows blue when it meets traces of blood. The iron in hemoglobin speeds the reaction.

1. **Use**: Forensic blood detection.
2. **Oxidizer**: Hydrogen peroxide.
3. **Catalyst**: Iron in hemoglobin.
4. **Glow**: Blue chemiluminescence.
5. **False positives**: Bleach and metals.

## Reel vs. record

- **Note**: None needed.

## Video: Luminol Lux: Luminol Glows Blue When It Meets Traces of Blood

- Duration: 16.3 s · Published: 2025-01-14
- File: https://detailenjoyer.com/assets/videos/DE1SNg5OCBk.mp4

### Transcript

Did you know, Luminol is a chemical compound widely used in forensic science for detecting trace amounts of blood at crime scenes when mixed with an oxidizing agent like hydrogen peroxide and exposed to iron and hemoglobin Luminol undergoes a chemical reaction called chemiluminescence, emitting a blue glow NOW YOU KNOW!

## Questions & answers

**Q: What does luminol detect?**  
A: Forensics. _(Source: Write-up · Exhibit A (Use) · Wikipedia: Luminol)_

**Q: What color is the glow?**  
A: Chemiluminescence. _(Source: Write-up · Exhibit B (Oxidizer) · Wikipedia: Luminol)_

**Q: What catalyzes it?**  
A: Blood. _(Source: Write-up · Exhibit C (Catalyst) · Wikipedia: Luminol)_

**Q: Which oxidizer?**  
A: Mixed in. _(Source: Write-up · Exhibit D (Glow) · Wikipedia: Luminol)_

**Q: What gives false positives?**  
A: Cleaning agents. _(Source: Write-up · Exhibit E (False positives) · Wikipedia: Luminol)_

## Sources

- [Wikipedia: Luminol](https://en.wikipedia.org/wiki/Luminol)

## Cite this case file

Easterling, Marcus. "Luminol Lux." The Detail Department (DetailEnjoyer), case file DD-459, last updated Jan 14, 2025. https://detailenjoyer.com/case/luminol-lux/