Standardized pH Buffer Solutions For use in calibration of pH meters. Ordering information for all buffers is listed below. pH Value Size Order Code 4.00 120 mL 500 mL 2866-J 2866-L 4.01 120 mL 500 mL 2807-J 2807-L 6.86 120 mL 500 mL 2808-J 2808-L 7.00 120 mL 500 mL 2881-J 2881-L 9.18 120 mL 500 mL 2809-J 2809-L 10.00 120 mL 500 mL 2896-J 2896-L Color-Coded pH Buffer Solutions Minute amount of color permits immediate visual distinction of different buffer values. pH Value Color Size Order Code 4.01 Red 500 mL 3771-L 7.00 Yellow 500 mL 3772-L 10.00 Blue 500 mL 3773-L   Buffer Tablets Add one tablet to 20 mL of Deionized Water to produce buffers. Available in 50, 100, and 1000 tablet packs. In foil strips of 10 tablets each. pH Value Order Code 4.01 3983 7.00 3984 10.00 3985   Conductivity/TDS Solutions The following potassium chloride solutions can be used to standardize conductivity meters. TDS values are based on a 0.7 conversion from conductivity. Description Size Order Code 74 µmhos/cm, 52 ppm 500 mL 6416-L 718 µmhos/cm, 503 ppm 500 mL 6417-L 1,413 µmhos/cm, 989 ppm 500 mL 6354-L 6,668 µmhos/cm, 4668 ppm 500 mL 6418-L 58,640 µmhos/cm, 41048 ppm 500 mL 6419-L Conductivity Neutralizing Solutions Code Description 3745 Alkalinity Reducing Tablets A convenient tablet containing adipic acid and phenolphthalein. Simply add tablets until the sample changes color. Available in 100 and 1000 tablet packs. 6483 Conductivity Neutralizing Solution Contains citric acid and phenolphthalein. Add liquid until sample changes color. Available in 60 mL, pint, and gallon sizes. 6479 Gallic Acid Powder Organic acid powder; indicator must be purchased and added separately. Add raw powder to sample containing indicator until color changes. Available in 100 g and 1 lb. sizes. 3705 Acid Indicator Contains acetic acid and phenolphthalein. Add liquid until sample changes color. Available in 30 mL, pint, and gallon sizes. Electrode Soaker Bottle Continuously soaks pH electrode in a storage solution to prevent probe dry out. Twist top O ring seal prevents leaks. Description Order Code Electrode Soaker Bottle 0668 Shipping Codes & Weight: The shipping code will refer to one of the following in the chart below. Weight will be in pounds and enclosed in ( ). NH: Non Hazardous - No Fees HF: Hazardous Materials - Air & Ground Fees R1: Small Quantity Hazardous Materials - No Fees R2 & R3: Hazardous Materials - Air Fees Only