This week, 7 Chemicals stocks are improving their overall ratings on Portfolio Grader. Each of these stocks is rated an “A” (“strong buy”) or “B” overall (“buy”).

Sherwin-Williams Company (SHW) is seeing ratings go up from a C last week to a B this week. Sherwin-Williams Company manufactures, distributes, and sells paint, coatings and related products to professional, industrial, commercial, and retail customers. The company also gets A’s in return on equity. For more information, get Portfolio Grader’s complete analysis of SHW stock.

International Flavors & Fragrances Inc.’s (IFF) ratings are looking better this week, moving up to a A from last week’s B. International Flavors & Fragrances Inc. creates, manufactures, and supplies flavors and fragrances for the food, beverage, personal care and household products industries. The company also gets A’s in return on equity. For more information, get Portfolio Grader’s complete analysis of IFF stock.

This week, Syngenta AG Sponsored ADR (SYT) pushes up from a B to a A rating. Syngenta AG Sponsored ADR is an agribusiness that is engaged in the discovery, development, manufacture and marketing products designed to improve crop yields and food quality. The company also gets A’s in return on equity. For more information, get Portfolio Grader’s complete analysis of SYT stock.

This week, Sensient Technologies Corporation’s (SXT) ratings are up from a C last week to a B. Sensient Technologies Corporation is a global manufacturer and marketer of colors, flavors and fragrances for products in the food and beverage, cosmetic and pharmaceutical, inkjet and other speciality markets. The company also gets A’s in return on equity. For more information, get Portfolio Grader’s complete analysis of SXT stock.

FMC Corporation (FMC) boosts its rating from a C to a B this week. FMC Corporation operates as a diversified research company in the chemical industry. The company also gets A’s in earnings momentum. For more information, get Portfolio Grader’s complete analysis of FMC stock.

Orion Engineered Carbons SA (OEC) gets a higher grade this week, advancing from a C last week to a B. The company also gets A’s in return on equity. For more information, get Portfolio Grader’s complete analysis of OEC stock.

This is a strong week for Gulf Resources, Inc. (GURE). The company’s rating climbs to B from the previous week’s C. Gulf Resources, Inc. manufactures chemical products for use in oil and gas field explorations, oil and gas distribution, oil field drilling, wastewater processing, papermaking chemical agents, and inorganic chemical. The company also gets A’s in operating margin growth and free cash flow. For more information, get Portfolio Grader’s complete analysis of GURE stock.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.