Dyeing of Wool with Martius Yellow
Description: Wool dyed in a warm solution of Martius Yellow Dye and ammonium hydroxide is yellow even after washing with water. Cotton dyed in this solution followed by rinsing, will remain white.
Source: Kristin Johnson
Year: 1999 Vol: N/A Page: N/A
Keywords: Wool, Martius Yellow Dye, Ammonium Hydroxide, Cotton
Rating: 
Hazard: Some
- Skin corrosion hazard
- Acute toxicity hazard
- Corrosive to metals
- Inhalation hazard
- Electric shock hazard
- Short term aquatic toxicity hazard
Effectiveness: Average
- Somewhat connected conceptually to course material
- Mild effects are seen by audience
- Time to results is high
- Good reliability
Difficulty: Medium
- Some concerted or timed manipulations
- Use of reactive substances
- Demos at non-standard conditions
Safety Precautions:
- Eye protection required
- Gloves required
- Perform in a well-ventilated area
- Absorbent materials on hand
- Sodium bicarbonate on hand
- Prevent release of reagent to the environment
- Use UL approved three-prong plug and outlet
Class: Biochemistry, Indicators
Division: General
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