---
product_id: 34656360
title: "pH Buffer Calibration Solution 3-Pack: pH 4.00 Buffer, pH 7.00 Buffer, and Electrode Storage Solution — 250 mL (8.4 fl oz) Each — NIST Traceable Reference Standards for All pH Meters"
brand: "biopharm"
price: "RM254"
currency: MYR
in_stock: true
reviews_count: 8
category: "Biopharm"
url: https://www.desertcart.com.my/products/34656360-ph-buffer-calibration-solution-3-pack-ph-4-00-buffer
store_origin: MY
region: Malaysia
---

# NIST traceable standards 3 precise pH calibration buffers Electrode storage & protection pH Buffer Calibration Solution 3-Pack: pH 4.00 Buffer, pH 7.00 Buffer, and Electrode Storage Solution — 250 mL (8.4 fl oz) Each — NIST Traceable Reference Standards for All pH Meters

**Brand:** biopharm
**Price:** RM254
**Availability:** ✅ In Stock

## Summary

> 🧪 Calibrate like a pro — precision you can trust, results you can flaunt!

## Quick Answers

- **What is this?** pH Buffer Calibration Solution 3-Pack: pH 4.00 Buffer, pH 7.00 Buffer, and Electrode Storage Solution — 250 mL (8.4 fl oz) Each — NIST Traceable Reference Standards for All pH Meters by biopharm
- **How much does it cost?** RM254 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.my](https://www.desertcart.com.my/products/34656360-ph-buffer-calibration-solution-3-pack-ph-4-00-buffer)

## Best For

- biopharm enthusiasts

## Why This Product

- Trusted biopharm brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Color-Coded Precision:** Quickly identify pH 4.00, 7.00, and storage solutions without guesswork.
- • **NIST-Traceable Accuracy:** Calibrate with confidence using standards verified against national benchmarks.
- • **Certified Quality Control:** Each batch includes lot numbers, expiration dates, and free certificates of analysis.
- • **Electrode Longevity Boost:** Storage solution keeps electrodes clean and extends their lifespan for consistent readings.
- • **Long Shelf Life Assurance:** Over one year of reliable use from receipt, minimizing waste and reorders.

## Overview

This 3-pack pH buffer calibration solution set includes pH 4.00, pH 7.00 buffers, and an electrode storage solution, each in 250 mL bottles. Manufactured in the USA with strict quality controls and NIST traceability, it ensures accurate calibration for all pH meters. Color-coded bottles, lot tracking, and certificates of analysis make it ideal for pharmaceutical, academic, research, and industrial labs seeking reliable, long-lasting calibration standards.

## Description

These buffer calibration solutions are suitable for the calibration of all pH meters. Each production lot is manufactured in our USA laboratory following carefully controlled written procedures and standardized against NIST standard reference materials (SRM) for highest accuracy. The finished product is assigned a unique Lot number and expiration date. These products will have greater than one year shelf life when received. The electrode storage solution will help keep the pH electrode clean and protected.

Review: Works great. Better alternative to more expensive brands. - Great product. Will buy again. Accurate and high volume for the price.
Review: Will buy more for sure! ⭐️⭐️⭐️⭐️⭐️ - I love it!

## Features

- Color Coded for Easy Identification
- Individually Bagged 250 ml (8.4 fl oz) Poly Bottles
- Lot Numbered and Expiration Dated
- Free Certificate of Analysis and Traceability
- For Pharmaceutical, Academic, Research and Industrial Labs

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01LVU36UD |
| Best Sellers Rank | #257,653 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #133 in Chemical Buffers |
| Date First Available | September 9, 2016 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 2.05 pounds |
| Manufacturer | Biopharm Inc |
| Package Dimensions | 9.75 x 6.75 x 3.5 inches |
| UPC | 721272377187 |

## Product Details

- **Brand:** Biopharm
- **Item Form:** Liquid
- **Item Volume:** 250 Milliliters
- **Item Weight:** 2.1 Pounds
- **Package Information:** Bottle

## Images

![pH Buffer Calibration Solution 3-Pack: pH 4.00 Buffer, pH 7.00 Buffer, and Electrode Storage Solution — 250 mL (8.4 fl oz) Each — NIST Traceable Reference Standards for All pH Meters - Image 1](https://m.media-amazon.com/images/I/71QPru9ZomL.jpg)
![pH Buffer Calibration Solution 3-Pack: pH 4.00 Buffer, pH 7.00 Buffer, and Electrode Storage Solution — 250 mL (8.4 fl oz) Each — NIST Traceable Reference Standards for All pH Meters - Image 2](https://m.media-amazon.com/images/I/71aDz1N4HZL.jpg)
![pH Buffer Calibration Solution 3-Pack: pH 4.00 Buffer, pH 7.00 Buffer, and Electrode Storage Solution — 250 mL (8.4 fl oz) Each — NIST Traceable Reference Standards for All pH Meters - Image 3](https://m.media-amazon.com/images/I/71gi31HViKL.jpg)
![pH Buffer Calibration Solution 3-Pack: pH 4.00 Buffer, pH 7.00 Buffer, and Electrode Storage Solution — 250 mL (8.4 fl oz) Each — NIST Traceable Reference Standards for All pH Meters - Image 4](https://m.media-amazon.com/images/I/71C3BjLjpkL.jpg)

## Questions & Answers

**Q: how many times can you calibrate with one bottle?**
A: If you're using a combination pH electrode rinse the electrode well with distilled water to  remove storage solution or whatever the electrode was previously in. Then rinse the electrode with a small amount (about 25 ml) of the buffer.  Throw away the rinse and add fresh buffer to cover the electrode well (25 to 50ml, depending upon how big your electrode is ).  If you're using a separate reference electrode you may need a larger volume to cover both electrodes well.  Swirl the electrode(s) in the buffer and let the reading stabilize. Normally you start with pH 7 and set that calibration point then repeat the process using pH 4 and use the "slope" adjustment to set this point. Do not pour the used buffer back into the buffer bottle; throw it away.  You risk contaminating your reference standard by trying to reuse it.  Depending upon the size of your electrode(s) you may need 50 ml to 100 ml each time to do a good calibration.   So the shorter answer is probably 3 to 5 calibrations per 8 oz bottle.  It is good practice to calibrate the same day you are measuring your sample(s) because the meter/electrode settings can "drift" out of calibration.  If you do pH measurements often you may want to buy the 500 ml (pint) size calibration kit.

**Q: I use the storage solution for my hm digital ph tester and I later get salt deposits on the lid, is this storage solution ok for this electrode?**
A: Yes it is OK.  Because the storage solution has a lot of potassium chloride dissolved in it crystals will form where the water has evaporated away.  You can wipe them away with a damp paper towel or simple ignore them.  They will not cause any problem.

**Q: I have a hm digital ph tester, how do i use the 4.0, 7.0 calibration solutions? do i dilute it or use it as is?**
A: Do not dilute it.  Pour a small amount (approx. 50 ml) into a small clean, dry beaker (or glass or jar).  For highest accuracy you should know the temperature of the solution (ideally 25 deg. C). You really need a good thermometer for accurate work.  Your unknown sample should be adjusted to 25 deg also at the time of measurement.  You can warm the sample to 25 deg. C by holding it against your warm skin for a while if it's within a few degrees of 25.  If the sample is really cold try 5 or 10 seconds in a microwave oven.  If you over do it just wait until it cools back to where you want it.  Start with the pH 7 standard and immerse the pH electrode in the small calibration sample and follow the instructions provided by your meter manufacturer.  Do NOT return the used buffer to the original bottle as this will ruin the integrity of the original standard.  Throw it away.  The original bottle will be good for a year or more if handled properly.

**Q: Are all the solutions compatible with bluelab ph meters**
A: Yes. Buffer solutions are buffer solutions. Simply ph’d fluid for meters to calibrate from. Brand of instrument makes no difference

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works great. Better alternative to more expensive brands.
*by S***E on November 8, 2020*

Great product. Will buy again. Accurate and high volume for the price.

### ⭐⭐⭐⭐⭐ Will buy more for sure! ⭐️⭐️⭐️⭐️⭐️
*by I***1 on August 22, 2025*

I love it!

### ⭐⭐⭐⭐⭐ The best calibration chem!!
*by M***E on October 24, 2021*

This is the dope. Love it!! Better than mixing powder. Always on hand Always ready. Except nothing less

## Frequently Bought Together

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- Milwaukee Instruments MA9016 Cleaning Solution for pH/ORP Electrode, 230 mL Volume

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*Product available on Desertcart Malaysia*
*Store origin: MY*
*Last updated: 2026-03-10*