Product Information: Indigo carmine indicator powder. A solution made with this indicator is blue at <11.4 pH and yellow at >13.0 pH. 

All chemicals come in sturdy amber glass jars.

Shipping: All products are shipped in sturdy packages that are insulated based on the weather in order to best maintain product quality. Most orders are shipped via USPS or UPS. Please ensure your shipping address is recognized by these carriers.

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Customer satisfaction is guaranteed if there is any problem on arrival of your order contact me through eBay for a refund or replacement.