Lab Safety


Chemical SOP - Bases

IsoLab, Department of Earth and Space Sciences


This chemical standard operating procedure (SOP) is for your safety. Read, understand, and follow this document. If this is a paper copy, you should check for the most recent version here: This document was created from a template modeled after the University of Washington Environmental Health and Safety Laboratory Safety Manual Standard Operating Procedures Components, which, as of 160818, is located here. If this link breaks, search the UW website for "chemical sop components".

Is bases particularly hazardous substances? NO

What is a particularly hazardous substance? The University of Washington Environmental Health and Safety defines it here.

The SDS for all bases can be found here.You should have taken EH&S Managing Laboratory Chemicals or similarly UW EH&S condoned course.

1. Process Name

Many processes in IsoLab use bases. They are prevalent and abundant and lab personnel need to be aware of how to be safe around them.

2. Chemical Name

IsoLab has solid and liquid forms of several bases. Sodium hydroxide, calcium hydroxide, ammonium hydroxide, etc.

3. Personal Protective Equipment

Wear chemical splash goggles and heavy-duty Sol-Vex Nitrile Gloves for concentrated bases. A lab coat or apron is recommended for personal protection and is required when dispensing quantities greater than 1 liter or when cleaning up a spill of a quantity greater than 1 liter.

4. Environmental / Ventilation Controls

Concentrated bases should be dispensed in a fume hood.

5. Special Handling Procedures & Storage Requirements

When diluting bases, small amounts should be added gradually to water and mixed thoroughly to dissipate any heat generated. Bases should be stored separately from acids, oxidizers, and flammable solvents. Bases in glass bottles over 1 liter should be transported in spill proof carriers. Bases are stored in 303B in Corrosive cabinet 2.

6. Spill and Accident Procedures

In case of skin contact, flush affected areas with copious amounts of water for 15 minutes. Obtain medical attention. Neutralize any spilled base with citric acid. Spill kit can be found under sink in labeled cabinets in 302A, 303B, and 302B. The citric acid is located with the spill kit in 303B.

7. Waste Disposal

EH&S has a treatment program for acids and bases; for more information see If disposing of as hazardous waste, label with Hazardous Waste Label, accumulate according to requirements, and send in Chemical Collection Request or Routine Pickup request, both available online at Chemical waste is accumulated in the gray secondary containment tubs in 303B near the door.

8. Special Precautions for Animal Use (if applicable)N/A
Particularly hazardous substance involved?NO, ignore 9-11
9. Approval Required


10. DecontaminationN/A
11. Designated AreaN/A


I have read and understood this Chemical SOP: