Mack-Cali Buys Virginia Complex

Mack-Cali Realty Corp., a real-estate company in Edison, announced on March 21 it paid about $262.5 million for Crystal House, an 828-unit apartment complex in Crystal City, Va., from luxury apartment developer AvalonBay Communities of Arlington, Va.

Cantel Acquires Siemen’s Division

Cantel Medical, an infection-control product distributor in Little Falls, annnounced on March 26 that its water filtration subsidiary, Mar Cor Purification of Skippack, Pa., acquired the hemodialysis water unit of health-care manufacturer Siemens in Munich, Germany.

Online Tutoring Company Acquired

OnlineTutorSolutions.com, an online tutoring company in Red Bank, announced on March 26 it has been acquired by Credo Reference, an online reference-resource company in Boston.

Checkpoint’s CheckView Acquired

Private equity firm Platinum Equity in Los Angeles announced on March 25 its acquisition of retail-surveillance company CheckView from Checkpoint Systems, a theft-prevention company in Thorofare.

AERC Acquires 2nd Solutions

2nd Solutions, an electronics-refurbishing company in Richmond, Va., announced on March 25 it has been acquired by AERC Recycling Solutions,a recycling company in Flanders.

Acquisition for Diamond Chemical

Diamond Chemical Co., a chemical company in East Rutherford, announced on March 21 it has acquired the warehouse at 29 Park Way in Upper Saddle River from camping equipment retailer Campmor Inc. in Bogota.