Universal Indicator Solution

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UU0010-1L UU0010-25ML UU0010-100ML UU0010-500ML
470302-982EA 26.25 USD
470302-982 470302-986 470302-984 470302-988
Universal Indicator Solution
Chemicals for Science Education
CAS Number: Mixture
Formula: Mixture
Density: 0.794 g/mL
Boiling and Freezing Point: 75-80°C, -114°C
Solubility: Water
Synonyms: Universal pH Indicator
Shelf Life: 36 Months

Note: The chemical specifications for some items on this product page may differ from the specifications listed above. For more information, consult the Safety Data Sheet or contact your Ward's representative.

Delivery information: This product is designed for educational and teaching laboratories, and no certificate of analysis is available.

Caution: This product is flammable.



   
 

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Disposal

This disposal method is published for your convenience. You MUST have checked with your federal, state, and local regulations before using this method and these methods are only applicable for small laboratory sized quantities.The disposal of this chemical does not need pretreatment and it is not necessary for any chemical reaction to be conducted before it is disposed into a landfill or down the school drain. HOWEVER, there are numerous conditions that should be met which are outlined below before this can be discharged.If the material is in the solid form, it can be buried in a landfill if:a. Local regulations have been confirmed that this material can be disposed of in a landfill.b. Chemical is packed into a cardboard box with an appropriate amount of packing material.c. Cardboard box is sealed with durable tape.If the material is in an aqueous form, it can be poured down the drain with excess water if:a. Local and State regulations have been checked and you have verified that this material is suitable for this type of disposalb. The school drain is connected to the sanitary sewer system.c. The quantity that you are disposing of is minimal. A good rule of thumb is less than 250 mL.d. Combinations of chemicals are not going down the drain at the same time.e. A twenty-fold excess of water is used when washing the chemical down the drain.A good resource to contact is the local wastewater treatment facility as they can give you guidance and be a resource on drain disposal.

Solution Prep

To prepare universal indicator, add 0.18 g of mehtyl red and 0.36 g of phenolphthalein to 550 mL of 95% ethyl alcohol. Next, add 0.43 g of bromthymol blue to 300 mL of DI water. Mix the two solutions and dilute to a final volume of 1 L. Add 0.1 M sodium hydroxide dropwise until the solution is green.

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