SIGMA-ALDRICH CORPORATION Part No. 34956-4L
Chemical name: n-Pentane Material form: Solvent Density (g/cm3): 0.631 Molecular weight: 72.15 Molecular formula: C5H12 Chemical purity: =99.0% UN Number: UN 1265

SIGMA-ALDRICH CORPORATION Part No. 360570-500ML
Formula: C₅H₅N Formula Weight: 79.10
CAS No.: 110-86-1 Purity: ≥99.0% Density: 0.978 g/mL at 25 °C(lit.) Packaging: 1, 2, 2.5, 4 x 4 L in glass bottle Packaging: 100, 500 mL in glass bottle

SIGMA-ALDRICH CORPORATION Part No. P5655-100G
Synonyms: Monopotassium phosphate; Potassium dihydrogen phosphate; prim.-Potassium phosphate Formula: KH₂PO₄ Formula Weight: 136.09
CAS No.: 7778-77-0 Purity: ≥99.0% Density: 2.338 g/mL at 25 ÝC(lit.)

SIGMA-ALDRICH CORPORATION Part No. 676845-4L
Synonyms: Ether; Ethyl ether Formula: (CH₃CH₂)₂O Formula Weight: 74.12
CAS No.: 60-29-7 Purity: ≥98.0% Density: 0.706 g/mL at 25 ÝC(lit.) Supplemental Hazard Statements: May form explosive peroxides., Repeated exposure may cause skin dryness or cracking. Packaging: 1, 4, 4 x 4 L in aluminum bottle

SIGMA-ALDRICH CORPORATION Part No. P7125-500G
Synonym: Pepsin A, Pepsin from hog stomach CAS Number: 9001-75-6 EC Number: 232-629-3 Enzyme Commission (EC) Number: 3.4.23.1 MDL Number: MFCD00081840 Analysis Note Optimum pH is 2-4. Active in 4 M urea and 3 M guanidine HCl. Stable at 60 ÝC. Pepsin is irreversibly inactivated at pH 8.0 - 8.5. Protein determined by E1%/280 Application Used to produce F(ab')2 fragments of antibodies. Pepsin is a peptidase used to digest proteins and is commonly used in the preparation of Fab fragments from antibodies. Pepsin, from porcine gastric mucosa, has been used to hydrolyze dry cervical samples in mice. Product P7125 is provided in powder form. Product P7125 has been used to denature DNA from kidney cells 1 and to digest pathology samples from anal canal carcinomas (ACC) biopsies prior to EGFR staining 2 . Unit Definition One unit will produce a ?A ₂₈₀ of 0.001 per min at pH 2.0 at 37 ÝC, measured as TCA-soluble products using hemoglobin as substrate. (Final volume = 16 mL. Light path = 1 cm.) Biochem/physiol Actions Pepsin hydrolyzes peptide bonds, not amide or ester linkages. Pepsin cleaves peptides with an aromatic acid on either side of the peptide bond. Sulfur-containing amino acids increase susceptibility to hydrolysis when they are close to the peptide bond. Pepsin preferentially cleaves at the carboxyl side of phenylalanine and leucine and at the carboxyl side of glutamic acid residues. Cleaves Phe-Val, Gln-His, Glu-Ala, Ala-Leu, Leu-Tyr, Tyr-Leu, Gly-Phe, Phe-Phe and Phe-Tyr bonds in the _ chain of insulin. Pepsin is the major proteolytic enzyme produced in the stomach. It digests proteins through the cleavage of interior peptide linkages. 3 Preferential cleavage: hydrophobic and aromatic residues in P1 and P1' postitions. Cleaves Phe-Val, Gln-His, Glu-Ala, Ala-Leu, Leu-Tyr, Tyr-Leu, Gly-Phe, Phe-Phe and Phe-Tyr bonds in the _ chain of insulin. Pepsin is the major proteolytic enzyme produced in the stomach. It digests proteins through the cleavage of interior peptide linkages. 3

SIGMA-ALDRICH CORPORATION Part No. 184519-4L
CAS Number: 8032-32-4 MDL No.: MFCD00081849 Boiling Point: 30-60 C(lit.); 35-60 C Density: 0.64 g/mL at 25 C(lit.) Refractive Index: n20/D 1.363(lit.) EC Number: 232-453-7 UNSPSC Code: 12190000 General description: Petroleum ether is a mixture of low boiling aliphatic hydrocarbons (mainly hexane and pentane) that is generally used as a laboratory solvent. General description: Petroleum ether is a colorless liquid. Extracts of leaves of Litchi chinensis Gaertn. (Sapindaceae) have been prepared in petroleum ether and were evaluated for antiinflammatory, analgesic and antipyretic activities. Pentanes and hexanes are the major constituents of petroleum ether. Application: Petroleum ether has been used for the analysis of total dietary fiber content by employing a total dietary fibre assay kit. It may be used in the absorption chromatographic purification of organic compounds.

SIGMA-ALDRICH CORPORATION Part No. 244023-500G
Synonyms: Potassium ferricyanide; Red prussiate Formula: K₃Fe(CN)₆ Formula Weight: 329.24
CAS No.: 13746-66-2 Purity: ≥99.0% Supplemental Hazard Statements: Contact with acids liberates very toxic gas. Packaging: 100, 500 g in poly bottle Packaging: 12 kg in fiber drum Packaging: 5 g in glass bottle

SIGMA-ALDRICH CORPORATION Part No. 190764-200L
Synonyms: sec -Propyl alcohol; IPA; Isopropanol; Isopropyl alcohol Formula: (CH₃)₂CHOH Formula Weight: 60.10
CAS No.: 67-63-0 Purity: ≥99.5% Density: 0.785 g/mL at 25 °C(lit.) Packaging: 1, 6 x 1, 2, 2.5, 4, 4 x 4 L in glass bottle Packaging: 20, 200 L in steel drum Packaging: 4 x 4 L in poly bottle Packaging: 500, 6 x 500 mL in glass bottle

SIGMA-ALDRICH CORPORATION Part No. 702587-250G
Chemical synonyms: Potassium hexacyanoferrate(III); Red prussiate Density (g/cm3): 1.14 Molecular formula: K3Fe(CN)6 Chemical purity: 0.99 Potassium ferricyanide(III) is a potassium salt widely employed as an external indicator in potassium dichromate titrations. A sensor containing potassium ferricyanide assisted enzyme electrode for estimating maltose and glucose in samples has been reported. Addition of potassium ferricyanide in the catholyte can improve the generation of power in microbial fuel cells (MFCs).

SIGMA-ALDRICH CORPORATION Part No. 402893-1L
Synonyms: Propyl alcohol Formula: CH₃CH₂CH₂OH Formula Weight: 60.10
CAS No.: 71-23-8 Purity: ≥99.5% Density: 0.804 g/mL at 25 ÝC(lit.) Packaging: 1, 2.5, 4 x 4 L in glass bottle Packaging: 20 L in steel drum Packaging: 500 mL in glass bottle