What is the self life?

pH 4.00 and pH 7.00 receives a 2 year expiration from the date of manufacture. pH 10.00 receives a 1.5 year expiration from the date of manufacture.

Does the certificate have any additional costs?

No. The certification(s) are included with the shipment at no additional cost.

Where can i find the buffer ph vs. temperature table that commonly comes with ph calibration buffers? not just the two values on the front.

It can be found on the this product page under the 'Downloads' option. Here's the link. https://images-na.ssl-images-amazon.com/images/I/81i3MCq4otL.pdf

how much is needed to calibrate a pen? How long does this usually last calibrating 1/week/min?

Depends on the pen size. the myron L pen with cup for the it'll be about 3oz for a triple rinse and calibrate. So 5 weeks since it's about 16.9oz. but other pens require more.

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Biopharm pH Calibration Buffer 3-Pack: pH 4.00, 7.00, and 10.00; 500mL Each | NIST traceable reference standards for all pH meters. Reliable quality since 1977. Certificates available. Color coded.

Product ID: 31398438

Details

Brand
Biopharm
Item Form
Liquid
Item Volume
500
Manufacturer
Biopharm Inc
Package Information
Bottle

🎨Color-coded for instant ID

📏NIST-traceable precision

🧪500 mL lab-grade bottles

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Sold byAmazon Sri LankaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🧪 Calibrate with Confidence — Because Precision is Non-Negotiable

LONG SHELF LIFE - Over one year of guaranteed stability upon receipt means fewer reorders and uninterrupted precision calibration.
READY FOR ANY LAB - Generous 500 mL bottles, individually bagged to maintain purity and convenience for pharmaceutical, academic, and industrial use.
CERTIFIED TRACEABLE - Each lot is uniquely numbered with expiration dates and includes a certificate of analysis for full compliance and confidence.
INSTANT IDENTIFICATION - Vibrant color-coded bottles (pH 4.00, 7.00, 10.00) eliminate guesswork and speed up your workflow.
PRECISION YOU CAN TRUST - NIST-traceable calibration ensures your pH meters deliver lab-grade accuracy every time.

This 3-pack of 500 mL pH calibration buffers (pH 4.00, 7.00, and 10.00) offers NIST-traceable, color-coded solutions designed for precise calibration of all pH meters. Manufactured under strict lab protocols, each lot is uniquely numbered, expiration dated, and comes with a certificate of analysis, making it ideal for pharmaceutical, academic, research, and industrial laboratories seeking reliable, long-lasting calibration standards.

Specifications

ASIN	B01E7U873K
Best Sellers Rank	#12,176 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #8 in Chemical Buffers
Brand Name	Biopharm
Container Type	Bottle
Customer Reviews	4.8 4.8 out of 5 stars (150)
Item Form	Liquid
Manufacturer	Biopharm Inc
Part Number	BB8886X
UPC	721272377101
Volume	500 Milliliters

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