6 grams of MB in total. Each bottle contains 1.0g of powder exactly.
MUST be diluted! To prepare 1% methylene blue solution, add 1 gram of powder to 100 ml (3.38 fl oz.) of water.
3rd-party tested, no formaldehyde / heavy metal. CAS: 7220-79-3. Store at room temperature.
NOTICE: Please operate with gloves as it has strong dyeing effect. Keep out of reach of children.