What is the quantity per bag?

Each bag contains about 3g of powder, which is sufficient to prepare 250ml of standard solution.

Does the product support customization?

Yes, we offer full customization, minor customization, and customization from samples or designs.

What certifications does the product have?

The product is certified under ISO9001 and CE standards.

pH Buffer Powder 4.01 6.86 9.18 for pH Test Measure Calibration Solution

Name: pH Buffer Powder 4.01 6.86 9.18 for pH Test Measure Calibration Solution
Brand: Zhengzhou Wollen Instrument Equipment Co., Ltd.
SKU: 796846702

Henan, ChinaZhengzhou Wollen Instrument Equipment Co., Ltd.

US$0.30-0.90

10 Sets

Product profile

Customization

Available

Portable

Appliance

Food Analysis, Medical Research, Biochemistry

Certification

ISO9001, CE

Name of Commodity

pH Buffer Powder

Product Standard

Bagged Powder

Weight

About 3G Each Bag

pH Value

4.01, 6.86 and 9.18

Proportion

250ml Standard Solution Per Bag

Expiration Date

Two Years

Transport Package

Carton Box

Specification

3g/bag

Trademark

WollenLab

Origin

China

HS Code

2835299000

Production Capacity

1000sets/Month

Key features

Multi-Point Calibration: Supports one-point, two-point, and three-point calibration for high accuracy.

Standard pH Values: Available in 4.01, 6.86, and 9.18 to cover various testing needs.

Long Shelf Life: Unopened powder lasts two years; opened solution lasts 3-6 months at 4-16C.

Wide Application Scope: Suitable for food analysis, medical research, and biochemistry fields.

Flexible Customization: Offers full, minor, and sample-based customization options for clients.

ISO9001 & CE Certified: Product meets international quality and safety standards for reliability.

OEM & ODM Services: Available for custom designs and manufacturing based on client requirements.

Cost-Effective Packaging: Each bag contains 3g powder to prepare 250ml of standard solution.

Company profile

Importers and ExportersFast DeliveryCustomization from SamplesOEM Services

Zhengzhou Wollen Instrument Equipment Co., Ltd.

Henan, China

CertifiedBusiness Type: Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 3 Years CertifiedNearest Port: Shanghai PortAverage Response Time: ≤2.77h

AI-Powered supplier vetting

SummaryWollen is a limited company with expertise in laboratory instrument production, focusing on customization and export, mainly to markets outside China. While it offers ODM and OEM services, it lacks a strong R&D and innovation presence, as no new products were developed recently. The company has no overseas presence and does not participate in trade shows, which could limit its exposure. Financial data is available for recent years, though details on credibility are sparse. Despite the absence of after-sales service records and a small workforce, Wollen maintains a broad export reach and a flexible customization capability.

Supplier typeWollen is a limited company not part of a larger company group, with a focus on laboratory instruments.

After-Sales capabilityThe supplier lacks written procedures or records for handling customer complaints and corrective actions.

R&D capabilityThe supplier focuses on innovation in product offerings but did not introduce new products recently.

Customization capabilityWollen offers extensive customization options including ODM and OEM services, highlighting strong customization capability.

Product Q&A

Q:What are the available pH values?

The powder is available in three standard values: 4.01, 6.86, and 9.18.

Q:How should the powder be stored?

Keep unopened in a ventilated, cool place away from sunlight. After opening, store at 4-16C and use within 3-6 months.

Q:How often should the pH meter be calibrated?

Calibrate once a week if the meter is always on, or every 3 months for normal use. Always calibrate before testing with a pen.

Q:What is the shelf life of the solution?

The powder lasts two years unopened. Once mixed, the solution should be used within 3-6 months if stored at 4-16C.

Q:How do I perform the calibration?

Wash the electrode with pure water, immerse it in the solution, and adjust the meter to match the solution's value. Start with 6.86, then use 4.01 or 9.18.