Buffers and Standards
Hydrogen ion buffers comprising a mixture of a weak acid and its conjugate base or vice-versa and used to stabilize pH; also diluents, washing solutions, and standard-value solutions used for a broad array of scientific calibration purposes.
The buffers used to calibrate pH meters may be certified and/or traceable to the National Institute of Standards and Technology (NIST). These buffers may also be color-coded for easy identification:
- Red: pH 4.0
- Yellow: pH 7.0
- Blue: pH 10.0
Buffer, Precision Reference Standard, pH 10.000 ± 0.005 at 25°C, Ricca Chemical
Standardized against NIST-certified pH references. High-Accuracy pH Buffer solutions are for use with meters with 0.001 resolution.
Ricca Chemical Company Iron AA Standard, 1000 ppm Fe in 3% HCl, Ricca Chemical
CAS: 7439-89-6 Molecular Formula: Fe Molecular Weight (g/mol): 55.85 MDL Number: MFCD00010999 InChI Key: XEEYBQQBJWHFJM-UHFFFAOYSA-N PubChem CID: 23925 ChEBI: CHEBI:82664 IUPAC Name: iron SMILES: [Fe]
Ricca Chemical Company Potassium Carbonate, 15% (w/v), Ricca Chemical
CAS: 584-08-7 Molecular Formula: CK2O3 Molecular Weight (g/mol): 138.21 MDL Number: MFCD00011382 InChI Key: BWHMMNNQKKPAPP-UHFFFAOYSA-L Synonym: potassium carbonate,dipotassium carbonate,potash,potassium carbonate, anhydrous,carbonic acid, dipotassium salt,carbonate of potash,pearl ash,salt of tartar,kaliumcarbonat,potassiumcarbonate PubChem CID: 11430 IUPAC Name: dipotassium carbonate SMILES: [K+].[K+].[O-]C([O-])=O
Ricca Chemical Company Sodium Thiosulfate, 0.0250 N (N/40), Ricca Chemical
CAS: 10102-17-7 Molecular Formula: H10Na2O8S2 InChI Key: PODWXQQNRWNDGD-UHFFFAOYSA-L Synonym: sodium thiosulfate pentahydrate,ametox,sodium thiosulfate, pentahydrate,antichlor,tinver,disodium thiosulfate pentahydrate,unii-hx1032v43m,ccris 3952,thiosulfuric acid, disodium salt, pentahydrate,sodium hyposulfite pentahydrate PubChem CID: 61475 ChEBI: CHEBI:32150
Ricca Chemical Company Silver Nitrate, 0.0500 N (N/20), Ricca Chemical
CAS: 7761-88-8 Molecular Formula: AgNO3 Molecular Weight (g/mol): 169.87 MDL Number: MFCD00003414 InChI Key: SQGYOTSLMSWVJD-UHFFFAOYSA-N Synonym: silver nitrate,silvernitrate,lunar caustic,silbernitrat,argenti nitras,nitrate d'argent,nitric acid silver i salt,silver mononitrate,silver i nitrate,argerol PubChem CID: 24470 ChEBI: CHEBI:32130 IUPAC Name: silver(1+) nitrate SMILES: [Ag+].[O-][N+]([O-])=O
Ricca Chemical Company Potassium Hydroxide, 0.500 N (N/2) in Denatured Alcohol, Ricca Chemical
CAS: 1310-58-3 Molecular Formula: HKO Molecular Weight (g/mol): 56.11 MDL Number: MFCD00003553 InChI Key: KWYUFKZDYYNOTN-UHFFFAOYSA-M Synonym: potassium hydroxide,caustic potash,potash lye,potassium hydrate,hydroxyde de potassium,potassa,potasse caustique,potassium hydroxide k oh,potassium hydroxide solution,caswell no. 693 PubChem CID: 14797 ChEBI: CHEBI:32035 IUPAC Name: potassium hydroxide SMILES: [OH-].[K+]
Ricca Chemical Company Nitrite Nitrogen Standard, 100 ppm N (328.5 ppm NO2-), Ricca Chemical
CAS: 7758-09-0 Molecular Formula: KNO2 Molecular Weight (g/mol): 85.10 MDL Number: MFCD00011408 InChI Key: BXNHTSHTPBPRFX-UHFFFAOYSA-M PubChem CID: 516910 IUPAC Name: potassium nitrite SMILES: [K+].[O-]N=O
Ricca Chemical Company Fluoride Standard, 1000 ppm F-, Ricca Chemical
CAS: 7681-49-4 Molecular Formula: FNa Molecular Weight (g/mol): 41.99 MDL Number: MFCD00003524 InChI Key: PUZPDOWCWNUUKD-UHFFFAOYSA-M PubChem CID: 5235 ChEBI: CHEBI:28741 IUPAC Name: sodium fluoride SMILES: [F-].[Na+]
Ricca Chemical Company Potassium Chloride, Saturated, Approximately 4 M, Ricca Chemical
CAS: 7447-40-7 Molecular Formula: ClK Molecular Weight (g/mol): 74.55 MDL Number: MFCD00011360 InChI Key: WCUXLLCKKVVCTQ-UHFFFAOYSA-M Synonym: potassium chloride,enseal,muriate of potash,klotrix,sylvite,slow-k,potassium chloride kcl,klor-con,chlorvescent,kalitabs PubChem CID: 4873 ChEBI: CHEBI:32588 IUPAC Name: potassium chloride SMILES: [Cl-].[K+]
Fisher Scientific Fluoride Standard, 100 ppm F-, Fisherbrand
CAS: 7681-49-4 Molecular Formula: FNa Molecular Weight (g/mol): 41.99 MDL Number: MFCD00003524 InChI Key: PUZPDOWCWNUUKD-UHFFFAOYSA-M PubChem CID: 5235 ChEBI: CHEBI:28741 IUPAC Name: sodium fluoride SMILES: [F-].[Na+]
Micro Essential Lab Hydrion™ Buffer Chemvelopes
Powdered ingredients make precision buffers: ±0.02pH at 25°C
Fisher Scientific Chloride Standard, 1000 ppm Cl-, Fisherbrand
CAS: 7647-14-5 Molecular Formula: ClNa Molecular Weight (g/mol): 58.44 MDL Number: MFCD00003477 InChI Key: FAPWRFPIFSIZLT-UHFFFAOYSA-M PubChem CID: 5234 ChEBI: CHEBI:26710 IUPAC Name: sodium chloride SMILES: [Na+].[Cl-]