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TES Monosodium Salt CAS 70331-82-7, ≥99% Biochemical Buffer Reagent sourcing visualCandidate for RFQ with COA/SDS and export classification verification
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TES Monosodium Salt CAS 70331-82-7, ≥99% Biochemical Buffer Reagent

Buyer-ready sourcing profile for TES monosodium salt CAS 70331-82-7 supplied as a white to almost white crystalline powder. Key checks should focus on CAS identity, assay ≥99%, appearance, water solubility, pH/pKa range, impurity profile, AR or biochemical reagent grade suitability, packing format, batch COA availability, and export documentation readiness.

Quick buying facts

Identify the grade, package, and import market before comparing suppliers.

Use this page to check the product identity, common specification points, document scope, package notes, and destination-market questions before sending a China sourcing request.

CAS No.: 70331-82-7Biochemical buffer reagent / fine chemical reagentCandidate for RFQ with COA/SDS and export classification verification
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Identity and grade

Typical specifications

  • CAS No.: 70331-82-7
  • Chemical name: TES monosodium salt
  • Molecular formula: C6H16NNaO6S
  • Molecular weight: 253.24
  • EINECS: 642-884-6
  • Appearance: white to almost white crystalline powder
  • Purity / assay: ≥99% as stated by source listing
  • Water solubility: soluble; reported H2O solubility 0.35 g/mL with clear, colorless solution
  • pKa: approximately 7.5 at 25°C
  • pH range: 6.8–8.2
  • Grade references on source page: AR, biochemical reagent, laboratory reagent, diagnostic reagent, teaching reagent, technical/practical use; buyer should confirm exact supplied grade per COA
  • Reported storage condition from listing: sealed, dry, room temperature
Who uses this page

Target buyers

  • Biochemical reagent distributors
  • Laboratory reagent importers
  • Life science consumable suppliers
  • Diagnostic reagent raw material buyers
  • University and research procurement teams
  • Industrial buffer formulation buyers
  • Contract research and analytical laboratory sourcing teams
Before matching

Documents to check

  • CAS number, grade, assay, and impurity profile
  • SDS, COA, TDS, HS code, and transport classification
  • Destination-market import documents before supplier matching
Package and route

Packing notes

  • Standard listing pack: 500 g plastic bottle
  • Transport package stated: carton
  • OEM packing indicated as available; confirm minimum order quantity, bottle size, inner liner, carton dimensions, and palletization
  • For overseas shipments, request photos or specifications for bottle seal, moisture protection, tamper-evident closure, carton labeling, and batch traceability
  • For bulk RFQs, confirm whether 1 kg, 5 kg, 10 kg, 25 kg, or custom export packs are available
Applications and sourcing options

Check whether this product fits the buyer's actual application.

Clear application, grade, package, and document notes help separate real sourcing demand from a vague price check.

Use context

Common applications

  • Buffer component qualification for biochemical research workflows
  • Laboratory reagent distribution under buyer-controlled specifications
  • Raw material screening for biological buffer formulations
  • Diagnostic reagent development or QC use subject to buyer validation
  • Research-grade aqueous buffer preparation where TES sodium salt is specified
How we compare

Sourcing options

  • Request sample first with COA and SDS for incoming QC comparison
  • Start with 500 g bottle evaluation before multi-kilogram purchase
  • For routine distribution, request locked specification, batch-to-batch COA format, and carton labeling template
  • For bulk procurement, negotiate moisture-protected export packaging and shipment documentation package
  • For regulated or diagnostic-related supply chains, require supplier questionnaire, audit documents, change-control statement, and traceability commitment
Human review

Compliance notes

  • Request current COA for the offered batch before purchase confirmation
  • Request SDS in English and destination-market format where applicable
  • Confirm HS code, export invoice description, country of origin, and manufacturer details before shipment
  • Confirm whether the product is classified as dangerous goods for the chosen transport route; do not rely on marketplace text alone
  • Ask supplier to provide non-DG statement or DG transport classification from the latest SDS, if applicable
  • Confirm impurity specifications such as moisture/water content, insoluble matter, heavy metals, chloride, sulfate, sodium content, residual solvents, and microbial/bioburden limits if relevant to intended use
  • No regulatory approval or end-use suitability should be assumed from the listing; buyer should verify with internal QA and local compliance teams
  • The source page states the product cannot be used for Folin protein determination; confirm technical limitations directly with supplier if this matters to the application
Buyer search paths

Related sourcing terms

These terms support long-tail discovery while keeping the page focused on useful product and China export buying context.

TES sodium saltTES monosodium salt CAS 70331-82-7biochemical buffer reagentGood's buffer supplierzwitterionic buffer reagentlaboratory buffer powderAR grade TES sodium saltTES buffer raw materialfine chemical reagent supplierwhite crystalline buffer powder
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RFQ questions before supplier matching

Turn this product into a quote request.

Share target market, quantity, packaging scope, artwork status, delivery destination, and required documents so CHN Chemicals can prepare a cleaner supplier comparison.

Questions to confirm
  • Can you provide a recent batch COA showing assay, appearance, solubility, pH or pKa-related test data, moisture, and impurity limits?
  • Is the offered material AR grade, biochemical reagent grade, diagnostic reagent grade, or technical grade? Please state the exact grade on quotation and COA.
  • What test method is used for purity ≥99% and are chromatograms or method references available?
  • Can you confirm CAS 70331-82-7 identity by FTIR, NMR, HPLC, titration, or another validated method?
  • What are the routine impurity controls for this product, including moisture, heavy metals, chloride, sulfate, insoluble matter, and residual solvents?
  • Is the solution specification clear and colorless at 0.35 g/mL in water, and is this tested batch-by-batch?
  • What packaging sizes are available for export orders beyond 500 g/bottle?
  • Can you provide English SDS, COA, TDS/specification sheet, packing list, commercial invoice, and certificate of origin if required?
Checks before quote
  • Request current COA for the offered batch before purchase confirmation
  • Request SDS in English and destination-market format where applicable
  • Confirm HS code, export invoice description, country of origin, and manufacturer details before shipment
  • Confirm whether the product is classified as dangerous goods for the chosen transport route; do not rely on marketplace text alone
  • Ask supplier to provide non-DG statement or DG transport classification from the latest SDS, if applicable
  • Confirm impurity specifications such as moisture/water content, insoluble matter, heavy metals, chloride, sulfate, sodium content, residual solvents, and microbial/bioburden limits if relevant to intended use
  • No regulatory approval or end-use suitability should be assumed from the listing; buyer should verify with internal QA and local compliance teams
  • The source page states the product cannot be used for Folin protein determination; confirm technical limitations directly with supplier if this matters to the application
Next step

Send the product page with your target quantity and market. A sourcing manager can then confirm sample options, supplier fit, packaging details, and open document gaps.