Quarterly report pursuant to Section 13 or 15(d)

INVENTORIES

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INVENTORIES
9 Months Ended
Sep. 30, 2018
Inventory Disclosure [Abstract]  
INVENTORIES
INVENTORIES

Inventories included the following:
 
 
September 30, 2018

 
December 31, 2017

 
 
(thousands of dollars)
Raw material
 
$
3,135

 
$
3,703

Work in process
 
164

 
27

Finished products
 
14,529

 
14,720

Total inventory
 
$
17,828

 
$
18,450



Inventory serves as collateral for our amended and restated credit agreement.  See Note 10.

Inventory included petrochemical products in transit valued at approximately $4.5 million and $3.7 million at September 30, 2018, and December 31, 2017, respectively.