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
Fehling's Alkaline Solution (Fehling Solution B), Ricca Chemical
For Determination of Reducing Sugars
Ricca Chemical Company TCLP Extraction Fluid 1, pH 4.93 ± 0.05 at 25°C, Ricca Chemical
For use in EPA 1311 Toxicity Characteristic Leaching Procedure
Ferrous Ammonium Sulfate, 0.00282 N (0.00282 M), 1 mL = 0.1 mg Cl2, Ricca Chemical
CAS: 7783-85-9 Molecular Formula: FeH20N2O14S2 Molecular Weight (g/mol): 392.13 MDL Number: MFCD00150530 InChI Key: MQLVWQSVRZVNIP-UHFFFAOYSA-L IUPAC Name: λ2-iron(2+) diammonium hexahydrate disulfate SMILES: [NH4+].[NH4+].O.O.O.O.O.O.[Fe++].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O
Potassium Chromate, 5% (w/v), Chloride Free, Indicator for Argentometric Titrations, Ricca Chemical
CAS: 7789-00-6 Molecular Formula: CrK2O4 Molecular Weight (g/mol): 194.19 MDL Number: MFCD00011368 InChI Key: XMXNVYPJWBTAHN-UHFFFAOYSA-N Synonym: potassium chromate,bipotassium chromate,potassium chromate vi,dipotassium monochromate,dipotassium chromate,tarapacaite,chromate of potash,chromate of potass,neutral potassium chromate,caswell no. 687 PubChem CID: 24597 ChEBI: CHEBI:75249 IUPAC Name: dipotassium dioxochromiumbis(olate) SMILES: [K+].[K+].[O-][Cr]([O-])(=O)=O
Cyanide Standard, 1000 ppm CN-, Ricca Chemical
CAS: 151-50-8 Molecular Formula: CKN Molecular Weight (g/mol): 65.116 InChI Key: NNFCIKHAZHQZJG-UHFFFAOYSA-N PubChem CID: 9032 IUPAC Name: potassium;cyanide SMILES: [C-]#N.[K+]
Synthetic Seawater, ASTM D 1141 Substitute Ocean Water without Heavy Metals, Ricca Chemical
CAS: 7732-18-5 Molecular Formula: H2O Molecular Weight (g/mol): 18.02 InChI Key: XLYOFNOQVPJJNP-UHFFFAOYSA-N PubChem CID: 962 ChEBI: CHEBI:15377 IUPAC Name: water SMILES: O
Iodine (Iodine-Iodide), 0.100 N (N/10), Ricca Chemical
CAS: 7553-56-2 Molecular Formula: I2 Molecular Weight (g/mol): 253.81 MDL Number: MFCD00011355 MFCD00164163 InChI Key: PNDPGZBMCMUPRI-UHFFFAOYSA-N Synonym: iodine,diiodine,iodine crystals,iodine sublimed,tincture iodine,vistarin,eranol,iodio,iodine solution,iode PubChem CID: 807 ChEBI: CHEBI:17606 IUPAC Name: diiodine SMILES: II
EDTA Titrant, 0.100 M (M/10), Ricca Chemical
CAS: 6381-92-6 Molecular Formula: C10H18N2Na2O10 Molecular Weight (g/mol): 372.24 MDL Number: MFCD00150037,MFCD00003541 InChI Key: OVBJJZOQPCKUOR-UHFFFAOYSA-L Synonym: edta disodium salt,cal-ex decalcifier,buffer solution, ph 10.00,sodium di ethylenediamine tetraacetate dihydrate,ethylenediamine tetraacetic acid, disodium salt dihydrate,ethylenediamine tetraacetic acid, disodium salt, standard solution,sodium di ethylenediamine tetraacetate standard solution,ethylenedinitrilo tetraacetic acid disodium, dihydrate, reagent, acs PubChem CID: 44120005 IUPAC Name: disodium 2-({2-[(carboxylatomethyl)(carboxymethyl)amino]ethyl}(carboxymethyl)amino)acetate dihydrate SMILES: O.O.[Na+].[Na+].OC(=O)CN(CCN(CC(O)=O)CC([O-])=O)CC([O-])=O
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
Potassium Chloride Reference Solution D, 146.93 μS/cm at 25°C, 0.001 M, Ricca Chemical
CAS: 7447-40-7 Molecular Formula: ClK Molecular Weight (g/mol): 74.55 MDL Number: MFCD00011360 InChI Key: WCUXLLCKKVVCTQ-UHFFFAOYSA-M PubChem CID: 4873 ChEBI: CHEBI:32588 IUPAC Name: potassium chloride SMILES: [Cl-].[K+]
Potassium Chloride Conductivity Standard, 50 μS/cm at 25°C, Ricca Chemical
CAS: 7447-40-7 Molecular Formula: ClK Molecular Weight (g/mol): 74.55 MDL Number: MFCD00011360 InChI Key: WCUXLLCKKVVCTQ-UHFFFAOYSA-M PubChem CID: 4873 ChEBI: CHEBI:32588 IUPAC Name: potassium chloride SMILES: [Cl-].[K+]
Potassium Chloride Reference Solution C, 1408.8 μS/cm at 25°C, 0.01 M, Ricca Chemical
CAS: 7447-40-7 Molecular Formula: ClK Molecular Weight (g/mol): 74.55 MDL Number: MFCD00011360 InChI Key: WCUXLLCKKVVCTQ-UHFFFAOYSA-M PubChem CID: 4873 ChEBI: CHEBI:32588 IUPAC Name: potassium chloride SMILES: [Cl-].[K+]