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Hanna pH 4.01 Calibration Buffer Solution – HI7004L, HI5004 & HI6004 HI7004L – Standard – 500 mL Bottle Calibration Buffers Hanna Instruments
by Hanna Instruments

Hanna pH 4.01 Calibration Buffer Solution – HI7004L, HI5004 & HI6004

Version: HI7004L – Standard – 500 mL Bottle
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Hanna pH 4.01 Calibration Buffer Solution – HI7004L, HI5004 & HI6004 Calibration Buffers Hanna Instruments
Hanna pH 4.01 Calibration Buffer Solution – HI7004L, HI5004 & HI6004 HI7004L – Standard – 500 mL Bottle Calibration Buffers Hanna Instruments
Hanna pH 4.01 Calibration Buffer Solution – HI7004L, HI5004 & HI6004 HI7004M – Standard – 230 mL Bottle Calibration Buffers Hanna Instruments
Hanna pH 4.01 Calibration Buffer Solution – HI7004L, HI5004 & HI6004 HI7004C – Standard – 500 mL Bottle (color coded) Calibration Buffers Hanna Instruments
Hanna pH 4.01 Calibration Buffer Solution – HI7004L, HI5004 & HI6004 HI7004L C – Standard – 500 mL Bottle, COA Calibration Buffers Hanna Instruments
Hanna pH 4.01 Calibration Buffer Solution – HI7004L, HI5004 & HI6004 HI7004 1L – Standard – 1 L Bottle (color coded) Calibration Buffers Hanna Instruments
Hanna pH 4.01 Calibration Buffer Solution – HI7004L, HI5004 & HI6004 HI7004 1G – Standard – 1 gal Bottle (color coded) Calibration Buffers Hanna Instruments
Hanna pH 4.01 Calibration Buffer Solution – HI7004L, HI5004 & HI6004 HI70004P – Standard – 20 mL Sachets (25 pcs.) Calibration Buffers Hanna Instruments
Hanna pH 4.01 Calibration Buffer Solution – HI7004L, HI5004 & HI6004 HI70004C – Standard – 20 mL Sachets (25 pcs.), COA Calibration Buffers Hanna Instruments
Hanna pH 4.01 Calibration Buffer Solution – HI7004L, HI5004 & HI6004 Calibration Buffers Hanna Instruments
Hanna pH 4.01 Calibration Buffer Solution – HI7004L, HI5004 & HI6004 HI5004 – Technical – 500 mL Bottle, COA Calibration Buffers Hanna Instruments
Hanna pH 4.01 Calibration Buffer Solution – HI7004L, HI5004 & HI6004 HI5004-R – Technical – 500 mL Bottle (color coded), COA Calibration Buffers Hanna Instruments
Hanna pH 4.01 Calibration Buffer Solution – HI7004L, HI5004 & HI6004 HI5004-R08 – Technical – 1 gal Bottles (2 pcs., color coded), COA Calibration Buffers Hanna Instruments
Hanna pH 4.01 Calibration Buffer Solution – HI7004L, HI5004 & HI6004 HI50004-02 – Technical – 20 mL Sachets (25 pcs.), COA Calibration Buffers Hanna Instruments
Hanna pH 4.01 Calibration Buffer Solution – HI7004L, HI5004 & HI6004 HI6004 – Millesimal – 500 mL Bottle, COA Calibration Buffers Hanna Instruments
Hanna pH 4.01 Calibration Buffer Solution – HI7004L, HI5004 & HI6004 HI6004-01 – Millesimal – 1 L Bottle, COA Calibration Buffers Hanna Instruments
Hanna pH 4.01 Calibration Buffer Solution – HI7004L, HI5004 & HI6004 HI60004-02 – Millesimal – 20 mL Sachets (25 pcs.), COA Calibration Buffers Hanna Instruments
Hanna pH 4.01 Calibration Buffer Solution – HI7004L, HI5004 & HI6004 Calibration Buffers Hanna Instruments
Hanna pH 4.01 Calibration Buffer Solution – HI7004L, HI5004 & HI6004 HI7004L – Standard – 500 mL Bottle Calibration Buffers Hanna Instruments
Hanna pH 4.01 Calibration Buffer Solution – HI7004L, HI5004 & HI6004 HI7004M – Standard – 230 mL Bottle Calibration Buffers Hanna Instruments
Hanna pH 4.01 Calibration Buffer Solution – HI7004L, HI5004 & HI6004 HI7004C – Standard – 500 mL Bottle (color coded) Calibration Buffers Hanna Instruments
Hanna pH 4.01 Calibration Buffer Solution – HI7004L, HI5004 & HI6004 HI7004L C – Standard – 500 mL Bottle, COA Calibration Buffers Hanna Instruments
Hanna pH 4.01 Calibration Buffer Solution – HI7004L, HI5004 & HI6004 HI7004 1L – Standard – 1 L Bottle (color coded) Calibration Buffers Hanna Instruments
Hanna pH 4.01 Calibration Buffer Solution – HI7004L, HI5004 & HI6004 HI7004 1G – Standard – 1 gal Bottle (color coded) Calibration Buffers Hanna Instruments
Hanna pH 4.01 Calibration Buffer Solution – HI7004L, HI5004 & HI6004 HI70004P – Standard – 20 mL Sachets (25 pcs.) Calibration Buffers Hanna Instruments
Hanna pH 4.01 Calibration Buffer Solution – HI7004L, HI5004 & HI6004 HI70004C – Standard – 20 mL Sachets (25 pcs.), COA Calibration Buffers Hanna Instruments
Hanna pH 4.01 Calibration Buffer Solution – HI7004L, HI5004 & HI6004 Calibration Buffers Hanna Instruments
Hanna pH 4.01 Calibration Buffer Solution – HI7004L, HI5004 & HI6004 HI5004 – Technical – 500 mL Bottle, COA Calibration Buffers Hanna Instruments
Hanna pH 4.01 Calibration Buffer Solution – HI7004L, HI5004 & HI6004 HI5004-R – Technical – 500 mL Bottle (color coded), COA Calibration Buffers Hanna Instruments
Hanna pH 4.01 Calibration Buffer Solution – HI7004L, HI5004 & HI6004 HI5004-R08 – Technical – 1 gal Bottles (2 pcs., color coded), COA Calibration Buffers Hanna Instruments
Hanna pH 4.01 Calibration Buffer Solution – HI7004L, HI5004 & HI6004 HI50004-02 – Technical – 20 mL Sachets (25 pcs.), COA Calibration Buffers Hanna Instruments
Hanna pH 4.01 Calibration Buffer Solution – HI7004L, HI5004 & HI6004 HI6004 – Millesimal – 500 mL Bottle, COA Calibration Buffers Hanna Instruments
Hanna pH 4.01 Calibration Buffer Solution – HI7004L, HI5004 & HI6004 HI6004-01 – Millesimal – 1 L Bottle, COA Calibration Buffers Hanna Instruments
Hanna pH 4.01 Calibration Buffer Solution – HI7004L, HI5004 & HI6004 HI60004-02 – Millesimal – 20 mL Sachets (25 pcs.), COA Calibration Buffers Hanna Instruments

Hanna pH 4.01 Calibration Buffer Solution – HI7004L, HI5004 & HI6004

$25.29
SKU: BTS-HI7004L

    NIST-Traceable pH 4.01 Calibration Buffer

    For calibrating pH meters, testers, and process controllers across the acidic range.

    • Standard and Technical grades accurate to ±0.01 pH; Millesimal to ±0.002 pH
    • Bottles from 230 mL to 1 gallon, single-use sachets, and FDA bottles
    • Lot number, expiration date, and temperature table on every label

See All Specs

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Fast Delivery

Most items ship same day

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Manufacturer Warranty

All products are covered by manufacturer warranty

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After-Sale Support

24/7 support

Hanna HI7004L pH 4.01 calibration buffer solution, 500 mL

Accurate Calibration on the Acidic Side

pH 4.01 is the calibration point for anything you measure below neutral. Paired with pH 7.01, it sets your meter or controller's slope across the acidic range, from water treatment and acid neutralization tanks to food, beverage, and wine testing.

Every batch is NIST traceable, standardized with a meter calibrated against two solutions prepared from NIST standard reference materials. Choose the grade, size, and packaging that fits how you work.

Choose Your Grade

Standard (HI7004 / HI8004)

Accuracy: ±0.01 pH @ 25 °C

COA: On request, or included on COA versions

Best for: Everyday calibration of meters, testers, and process controllers

Technical (HI5004)

Accuracy: ±0.01 pH @ 25 °C

COA: Included

Best for: Routine lab work that needs documentation

Millesimal (HI6004)

Accuracy: ±0.002 pH @ 25 °C

COA: Included

Best for: High-precision lab measurement

Built-In Quality and Traceability

NIST traceable
NIST Traceable
Each batch is standardized with a meter calibrated against two solutions prepared from NIST reference materials.
Color-coded buffer solutions
Color-Coded Options
Select versions include a dye, so you can tell your buffers apart at a glance.
Certificate of analysis
Certificate of Analysis
Included with Technical, Millesimal, and COA versions, and available on request for the rest.
Lot number and expiration date
Lot and Expiration Info
Every bottle and sachet is printed with its batch number and expiration date.
pH versus temperature reference table
Temperature Reference Table
The label lists the buffer's pH at each temperature, so you can calibrate accurately away from 25 °C.
Safety data sheet
Safety Data Sheets
SDS documentation is available on request for every version.

Packaging to Fit How You Work

Single-use buffer sachets
Single-Use Sachets
Each sealed 20 mL sachet is as fresh as the day it was filled. Ideal for field work, testers, and portable meters.
Buffer solution bottle
Bottles
From 230 mL to 1 gallon, opaque to block light and sealed airtight with a tamper-evident cap.
FDA bottle
FDA Bottles
Airtight, opaque, tamper-evident bottles for food, beverage, and other regulated environments.

Tip for Accurate Results

Once opened, a pH 4 buffer can grow mold or bacteria, which shifts its value. Pour out only what you need, recap the bottle right away, and never pour used buffer back in. If the solution turns cloudy or shows growth, replace it. For the most reliable results, use sachets or a freshly opened bottle.

    SKU Family HI7004, HI8004, HI5004, HI6004 series
    Description pH 4.01 Calibration Buffer Solution
    pH Value @ 25 °C 4.01
    Accuracy @ 25 °C Standard and Technical: ±0.01 pH
    Millesimal: ±0.002 pH
    Traceability NIST traceable
    Sizes 230 mL, 500 mL, 1 L, and 1 gal bottles; 20 mL single-use sachets (25 pcs.)
    Packaging Opaque, airtight bottles with tamper-evident seal; FDA bottles; sealed sachets
    Color Coding Available on select versions
    Certificate of Analysis Included on Technical, Millesimal, and COA versions; available on request for others
    Labeling Lot number, expiration date, and pH vs. temperature reference table

    Shipping, Return, and Warranty Policy

    At Blue Tiger Scientific, we are proud to distribute authentic Hanna Instruments products. The following policies apply to all purchases made through our store.

    Shipping Policy

    • All orders are shipped via FedEx from Hanna Instruments' fulfillment center in Smithfield, Rhode Island.
    • FedEx Ground is the standard method; expedited options (2-Day, Overnight) are available for an additional cost.
    • Hanna Instruments only ships to residential or business addresses within the United States (no PO Boxes).
    • Orders placed after business hours, weekends, or holidays will ship the next business day, pending product and carrier availability.
    • Shipping timelines may vary depending on product availability, order size, and carrier logistics.
    • Blue Tiger Scientific and Hanna Instruments are not responsible for carrier delays, weather-related disruptions, or other unforeseen delivery issues once the order has shipped.

    Return Policy

    • All return requests must be coordinated directly with Blue Tiger Scientific before a product is sent back.
    • Products must have a Return Merchandise Authorization (RMA) number issued by Blue Tiger Scientific before being returned.
    • Products must be returned in new or like-new condition, with the original packaging and proof of purchase (such as an invoice or packing slip).
      Customers are responsible for return shipping costs unless otherwise stated.
    • Unauthorized returns (without an RMA) will be refused and returned at the customer's expense.
      Returns are subject to inspection and approval. Products not in acceptable condition may be denied credit.
    • Some products, such as custom-built, special order, and hazardous materials, may not be eligible for return.

    Warranty Policy

    • Hanna Instruments' products are covered by their Limited Warranty against defects in materials and workmanship under normal use.
    • All warranty claims and services are handled directly by Hanna Instruments.
    • Warranty periods vary by product. If unspecified, the standard warranty term is 18 months from the Hanna Instruments factory ship date.
    • If you experience an issue believed to be covered under warranty, please contact Hanna Instruments for guidance on how to submit your warranty request to Hanna Instruments.
    • Customers must follow Hanna Instruments' warranty submission process, including providing a claim number, product model and serial number, and a detailed description of the issue.
    • Hanna Instruments will determine whether products are repaired, replaced, or otherwise serviced under warranty.
    • Note: Warranty coverage does not apply to damage caused by misuse, accidents, unauthorized repairs, or improper storage and handling.

    Important Notes

    • Some Hanna Instruments products are custom-made or built to order. Shipping will occur once the product is ready.
    • In the event of backorders, you may request partial shipments.
    • Delays beyond our control (e.g., material shortages, import delays, or carrier issues) may occasionally occur.

Questions about a product? Ask us here.

email us here: info@bluetigerscientific.com or live chat

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