Pfaltz & Bauer

Chemical Product Search
Search for a chemical:

You can use a "*" for unknown characters.
Chemical Name, CAS Number Product Number


Search for an MSDS/SDS:

You can use a "*" for unknown characters.
Chemical Name, CAS Number Product Number

We care about your privacy.

Have a Difficult Technical Issue?
Write in and "Ask Dr. Ed.", No one has stumped him yet! He will also address the most interesting chemical research topics in each eNewsletter. So click here now to email Dr. Ed.


In The News...

What We Do:

Dyes & Colors
Flavors & Fragrances
Stable Isotopes
and more...

Pfaltz & Bauer, Inc. Acquires Assets of Eastern Chemical Corp., a supplier of Specialized Chemicals to Researchers and Manufacturers

December 12, 2007

Waterbury, Connecticut – December 12, 2007. Pfaltz & Bauer, a premier worldwide marketer of over 25,000 fine and rare chemicals, has purchased the assets of Eastern Chemical Corp. from United-Guardian, Inc., Hauppauge, NY. Eastern Chemical markets highly specialized chemicals to researchers and manufacturers.

"Eastern's customers can expect a seamless transition when they call us at 1-800-225-5172," says Pfaltz & Bauer Owner and President Mark D. Halperin. "In addition, they will benefit from Pfaltz & Bauer's technical service chemists, in-house laboratory & warehousing facilities, extensive product line and worldwide distribution network."

At, users can utilize Pfaltz & Bauer's full Online Catalog to access a multitude of hard to find chemicals currently in stock and available for same day shipments. They can also visit the Molecular Mall, which features Pfaltz & Bauer's in-stock supply of especially rare chemicals for researchers who are working to create new compounds.

For more information about Pfaltz & Bauer, please visit www.pfaltzandbauer.comor call 1-800-225-5172 or 203-574-0075.

ABOUT PFALTZ & BAUER Pfaltz & Bauer's mission is to supply hard-to-find chemicals, as well as a wide product range of over 25,000 chemicals, to researchers and manufacturers in industry, government and academia throughout the world. Their 65,000 square foot office, laboratory and production & warehouse facility, located in central Connecticut, USA, contains many chemicals found nowhere else in the world. For more information please visit their website at or call 1-800-225-5172 or 1-203-574-0075.


Rare Chemicals Supplier Copies Amazon

February 27, 2002
The Alchemist
A publication of

You want an out of print book, secondhand or otherwise, and so you try Amazon. They tell you that it's out of print but offer maybe three or four secondhand bookstores to which they are affiliated and when you click on any one of them you are told what condition the book is in and its cost. For book lovers it is a fabulous service. When Mark Halperin bought Pfaltz & Bauer in Waterbury, Connecticut six years ago, he was hardly thinking of Amazon, as the 102-year-old company dealt in rare chemicals of the kind sought by research laboratories worldwide. Within two years, he had noted the similarity as both businesses in rare chemicals and in rare books are absolutely supplier dependent. He said, "I saw the analogy to what Amazon was doing, and how we could do it. It was a real milestone in our company. We were completely able to change our character and become an Internet company."

As with the rare book, the buyer will pay over the odds, so with some rare chemicals selling for hundreds of dollars for a few grams, this compensates for low volume sales and special handling. 'Challenge us today' is the bullish invitation on the Pfaltz & Bauer website, where they have just launched an online 'Molecular Mall', specializing in rare chemicals for researchers who are trying to create new compounds.

Operating out of a 70 000 square foot production and warehouse facility, with an estimated 25 000 rare and fine chemicals, they claim to have on hand many chemicals found either with great difficulty or nowhere else in the world. They package to specified quantities, 'from milligram through multiple drum quantities'.

We rang Mark Halperin and asked him the big question. Where do they get the chemicals? He replied, "The company has been building sources from the year 1900, when there was not much of a chemicals business. Much of what was required in the industry had to be imported. Over the years, through directories and other methods, we built up our sources and stock."

by Brian Rothery
© 2002 The Alchemist


Old formula, modern means

Sunday, February 17, 2002
Republican American

Just what do you do when you need some 2-Cyclohexylamino-1-Phenylethanol?

Not that you would, unless you're a research scientist or chemist, but it's not exactly something found on the shelves of the local supermarket or hardware store. And at nearly $125 for 10 grams - about the same amount as 15 Altoids peppermints - it's not exactly something many people keep lying around.

But Mark Halperin does. Halperin owns Waterbury-based Pfaltz & Bauer, a 102-year-old Waterbury company that deals in rare chemicals sought by pharmaceutical companies, research laboratories and chemists worldwide. It does much of its business these days on the Internet, operating as something of an of the chemical business.

"I saw the analogy to what (Amazon was) doing, and how we could do it," said Halperin, who bought the operation nearly six years ago and managed to get the company's catalog of rare chemicals into cyberspace about two years later. "It was a real milestone in our company. We were completely able to change our character and become an Internet company."

Based in a 70,000-square-foot warehouse at 172 East Aurora Street, Pfaltz & Bauer sits on a six-acre site and carries an estimated 25,000 rare and fine chemicals. In December, the company launched its online "Molecular Mall," where it now lists especially rare chemicals for researchers who are trying to create new compounds. Because the company has them already in stock, it usually can ship them the same day.

"We've isolated chemicals that are really not going to be found any place else," Halperin said. "What we're really going after is laboratory researchers who are looking for novel compounds. It lets them search through and get ideas about the different things we have."

Chemists and others doing laboratory research commonly find themselves in the position of needing hard-to-find compounds, said Paul M. Lahti, head of the chemistry department at the University of Massachusetts at Amherst. Lahti, who heads the Lahti Research Group at the university, said he has turned to Pfaltz & Bauer several times during the last couple of decades.

"You have two things you can do when you want to develop a new molecule," Lahti said. Those options include creating the molecule from scratch, which can be a time-consuming and costly enterprise, or buying a compound that might be closer to the desired product.

"Somebody like me, a university research chemist, I don't want to take a year to teach a graduate student to make this," Lahti said. "We don't have it. We want it. We don't want to make it, necessarily."

That leads chemists to companies like Pfaltz & Bauer.

"There are many companies that have their own niches," he said. "They are a known company to the synthetic chemical community."

Pfaltz & Bauer got its start in 1900 in New York City as an importer of dies, stains and some chemicals from Europe.

It was a family-owned operation until it was bought in 1965 by the Aceto Corp., a New York-based distributor of pharmaceutical and industrial chemicals.

"They made a succession of moves and finally came up here in 1985," said Halperin, who said he found out the company was for sale through a classified advertisement in the Wall Street Journal.

The company's last catalog, published in the mid-1990s, featured 14,000 products on 1,000 pages. With 25,000 chemicals, updating the tome becomes a near impossible task, Halperin said.

"By the time it comes out, it's already obsolete," he said. "What the Internet has allowed us to do is as we're doing our thing with the products each day ... we update it immediately on the system. We're literally updating our catalog every day."

He estimates about 50 percent of the company's quotes are now done over the Internet. The company, which employs about 15 people locally, tests and repackages its chemicals in Waterbury. It can also arrange custom manufacturing of chemicals, outsourcing those operations to manufacturers.

"Much of the business is small quantities of very highly specialized chemicals to researchers," Halperin said. "Most of what we sell is very expensive. It's used in very small concentrations."

At one time or another, he said, most of the major pharmaceutical companies end up checking in with the company as part of their drive to discover new treatments.

"All of that stuff creates a demand for stranger and stranger, off-the-wall chemicals that are harder and harder to find," he said. "In some cases, we have the only inventory of it in the world."

By David A. Smith
© 2002 Republican-American

Molecular Mall