Reagent-grade crystalline salts in CP / EP grade, 500 g per bottle, positioned as factory maintenance consumables for wastewater neutralizing, buffer preparation and QC analysis checks.
General-salt chemical reagents are basic chemicals used routinely in factory maintenance. This series covers two reagent-grade crystalline salts: sodium bicarbonate (NaHCO₃) and sodium chloride (NaCl), packed 500 g per bottle. They are neither bulk industrial chemicals nor analytical reagents but sit between the two as “maintenance-grade reagents” — between bulk industrial grades and analytical grade — and serve as everyday consumables for factory QC, wastewater treatment, buffer preparation and process adjustment.
A JIAHON affiliated company supplies customers throughout Taiwan.
Specifications
| Item | Sodium bicarbonate NaHCO₃ | Sodium chloride NaCl |
|---|---|---|
| Chemical name | Sodium Bicarbonate | Sodium Chloride |
| Molecular weight | 84.01 | 58.44 |
| Reagent grade | CP (chemically pure) | EP (European Pharmacopoeia grade) |
| Purity | Per COA | Per COA |
| Appearance | White crystalline powder | White crystals |
| Water solubility | Readily soluble (96 g/L @20 °C) | Readily soluble (360 g/L @20 °C) |
| pH (aqueous) | 8.0–8.6 (weakly alkaline) | 5.5–7.5 (neutral) |
| Packaging | 500 g reagent bottle | 500 g reagent bottle |
| Storage | Cool, dry place, room temperature | Cool, dry place, room temperature |
| Shelf life | 3–5 years unopened | 3–5 years unopened |
Applications
Maintenance-grade reagent salts are a middle tier between bulk industrial chemicals and analytical reagents for factory QC and maintenance. Three common uses:
1. Wastewater neutralizing and pH adjustment
Weakly alkaline NaHCO₃ neutralizes acidic wastewater more gently than NaOH, without over-alkalizing (pH overshoot). Semiconductor and electronics plant ETP systems sometimes use NaHCO₃ for a final “fine neutralizing” step. NaCl is used for ionic strength adjustment and discharge standard checks.
2. Buffer and analysis check preparation
QC labs need NaCl to prepare PBS (phosphate buffered saline), SSC and other buffers. Conductivity checks use a 0.01 mol/L NaCl standard solution. NaHCO₃ is used for standard buffers in the pH 8–10 range. Reagent-grade purity helps make preparations reproducible.
3. Facility and equipment cleaning
Weakly alkaline NaHCO₃ cleans grease (by saponifying oils), removes boiler scale and is the main component of BC-class dry chemical extinguishing powder. Reagent grade avoids equipment corrosion from impurities in bulk chemicals. In recirculating cooling water, NaCl serves as “regeneration salt” for resin columns.
Choosing the grade by application
| Application | Recommended grade | Note |
|---|---|---|
| General plant wastewater neutralizing | Bulk industrial (not reagent) | Purity about 95–98% |
| QC buffer preparation | AR (analytical reagent) | Purity 99.5%, defined impurities |
| Factory maintenance / fine neutralizing | CP / EP (this series) | Purity per COA |
| Pharmaceutical / GMP lines | USP / EP | Meets pharmacopoeia requirements |
| Direct wafer contact in semiconductors | VLSI / SEMI | Metal impurities at ppt level |
| Food / beverage (reagents can’t substitute) | Food-use grade | Requires GMP / food certification |
GR / AR / CP / EP / industrial grade: how purity differs
| Grade | Purity | Impurity specification | Typical use |
|---|---|---|---|
| GR (guaranteed reagent) | ≥ 99.8% | Specified at ppm level | Precision analysis, trace measurement |
| AR (analytical reagent) | ≥ 99.5% | Specified | QC chemical analysis, quantitation |
| CP (chemically pure) | ≥ 98–99% | General impurity range | Factory maintenance, fine wastewater neutralizing |
| EP / USP | Per pharmacopoeia | Pharmacopoeia requirements | Pharmaceutical GMP lines |
| SEMI / VLSI | ≥ 99.99% | Metal impurities at ppt level | Direct wafer-contact processes |
| Bulk industrial | 95–98% | Not specified | Large-volume wastewater neutralizing, washing |
Common selection mistakes:
- Using table salt (with iodine and anti-caking agents) instead of NaCl reagent → interferes with analysis results.
- Using bulk industrial grade for QC → results not reproducible.
- Using AR grade for wastewater neutralizing → grade higher than needed.
- Using CP grade on pharmaceutical lines → violates GMP.
This page lists sodium bicarbonate CP grade and sodium chloride EP grade (500 g per bottle); GR, AR, SEMI and other grades are available on request.
Storage, shelf life and handling after opening
Storage principles:
- Ventilated, dry place out of direct sunlight.
- Room temperature 15–25 °C, humidity < 60% RH.
- Don’t store next to acids or alkalis (NaHCO₃ releases CO₂ with acid and may swell the bottle).
- Close tightly after opening to avoid moisture caking.
| Condition | NaHCO₃ | NaCl |
|---|---|---|
| Recommended to use up after opening | 6–12 months | 1–2 years |
| For QC use | Within 6 months | Within 1 year |
| Common signs of degradation | Moisture caking, slow decomposition to Na₂CO₃ | Moisture uptake, purity drop |
In practice: date the bottle when opened and open a new one when it expires. Label QC reagents separately and don’t mix them with plant reagents. Stop using at once if you see caking, discoloration or dampness.
Ordering: five items of information at once
| Item | Description | Example |
|---|---|---|
| 1. Compound | Name + formula + CAS No. | NaHCO₃, CAS 144-55-8 |
| 2. Grade | Purity grade needed | CP / AR / GR / USP / SEMI |
| 3. Packaging | Unit size | 500 g / 1 kg / 25 kg / 1000 kg |
| 4. Application | Actual use | QC analysis / wastewater neutralizing / process adjustment |
| 5. COA | Whether a certificate of analysis is needed | Lot number + purity + impurity content |
Packaging listed on this page is 500 g per bottle; other pack sizes are available on request.
Common questions
Can I use table salt instead of NaCl reagent? No. Table salt contains iodine and anti-caking agents that interfere with analysis results.
Request a quote
Send the five items above. For availability, please ask. Request a quote →