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6-Methoxy-2-vinylnaphthalene features a naphthalene backbone with a methoxy group (–OCH₃) at the 2‑position and a vinyl group (–CH＝CH₂) at the 6‑position. Its molecular formula is C₁₃H₁₂O, with a molecular weight of 184.23 g/mol, and it appears as a white to light yellow crystalline powder. The methoxy group enhances solubility in organic solvents, while the vinyl group provides a reactive site for key transformations such as hydroformylation, hydroesterification, and polymerization.

Fumaric acid monoethyl ester calcium salt is the calcium salt of fumaric acid monoethyl ester, with a 2:1 ratio of monoethyl fumarate anions to calcium cation. Its molecular formula is C₁₂H₁₄CaO₈ (calculated: 2 × C₆H₈O₄ minus 2H⁺ + Ca²⁺ gives C₁₂H₁₄CaO₈, molecular weight 326.31 g/mol). The compound appears as a white to off‑white crystalline powder and decomposes at 285 °C without melting – a typical behavior for metal carboxylates. Its InChI key is WOONQYHBMBCNDD-SYWGCQIGSA-L, and the SMILES representation C(=O)(O[Ca]OC(=O)/C=C/C(=O)OCC)/C=C/C(=O)OCC shows two monoester units bridged by a calcium ion. The product is classified as an irritant (Xi, R36/37/38), but with standard protective measures (S26‑S36) it can be handled safely in any organic synthesis laboratory.

This 5-Benzothiazolecarboxylicacid,2-methyl-(8CI,9CI) is built around a benzothiazole core – a bicyclic ring system where a benzene ring fuses with a thiazole (a five‑membered ring containing both sulfur and nitrogen). At the 2‑position of the thiazole ring sits a methyl group (–CH₃), and at the 6‑position of the benzene ring a carboxylic acid (–COOH). The result is a rigid, nearly planar structure with a molecular weight of just 193.22. The compound appears as an off‑white to yellow solid (color can vary depending on purity and crystal form) with a sharp melting point of 202 °C – indicating good crystallinity and thermal stability. Its predicted pKa is 3.61±0.30, typical for an aromatic carboxylic acid, and the predicted density is 1.430±0.06 g/cm³. The boiling point is high (385.2 °C at atmospheric pressure, extrapolated), as expected for a polar, low‑volatility solid.

5-Chloro-quinolin-2-ol (5‑Chloro‑2‑hydroxyquinoline) is a heterocyclic compound with the molecular formula C₉H₆ClNO and a molecular weight of 179.60 g/mol. The structure consists of a quinoline fused ring system with a chlorine substituent at the 5‑position and a carbonyl/hydroxyl group at the 2‑position — existing predominantly in the 2(1H)‑quinolinone tautomeric form. The compound appears as a white to light‑yellow to light‑orange powder with a melting point of 288–289 °C (when recrystallized from methanol). The high melting point reflects strong intermolecular hydrogen bonding in the crystal lattice, characteristic of 2‑quinolinones.

This molecule looks simple: C₄H₈O₃, molecular weight just 104.1. But don’t let its size fool you. (S)-(-)-2-Methoxypropionic acid carries a single chiral center at the α‑carbon (the carbon bearing both the methoxy and the carboxylic acid groups). The specific rotation is negative, and its enantiopurity is what gives this compound value as a chiral reagent in asymmetric transformations. The structure consists of a propionic acid backbone with a methoxy substituent at the 2‑position, locked into the S configuration. It appears as a transparent, slightly yellow liquid, with a boiling point of 99 °C at 20 mmHg and a refractive index range of 1.4132–1.4152. While most simple carboxylic acids are solids or liquids at room temperature, this one is a low‑viscosity liquid that is freely soluble in common organic solvents such as chloroform, ethyl acetate, and methanol.

If (S)-(-)-2-methoxypropionic acid is the left hand, then (R)-(+)-2-methoxypropionic acid is the right hand. These two enantiomers share the same molecular formula (C₄H₈O₃, MW 104.1), the same boiling point (108–110 °C at 30 mmHg), the same density (~1.11), and the same refractive index range (1.4132–1.4152). They dissolve in the same solvents (chloroform, ethyl acetate, methanol – each slightly), and both have a predicted pKa of 3.59±0.10. But at the chiral center, they differ – one rotates plane‑polarized light to the left, the other to the right. This one is (R)-(+) , and it appears as a transparent colorless liquid when pure. Cosperpharm supplies (R)-(+)-2-methoxypropionic acid with documented enantiopurity and full safety documentation. Whether you need a few grams for method development or larger quantities for process chemistry, we deliver in secure, inert‑purged containers.