Exhibit 21.1
SUBSIDIARIES OF PQ GROUP HOLDINGS INC.
| ENTITY | JURISDICTION | |
| PQ Group Holdings Inc. | Delaware | |
| PQ Holdings Inc. | Delaware | |
| CPQ Midco I Corporation | Delaware | |
| PQ Corporation | Pennsylvania | |
| PQ Holdings I Limited | United Kingdom | |
| PQ Intermediate Limited | United Kingdom | |
| PQ Germany GmbH | Germany | |
| PT PQ Silicas Indonesia | Indonesia | |
| PQ Sweden A.B. | Sweden | |
| PQ Finland Oy | Finland | |
| PQ Silicas Holdings South Africa Pty Ltd. | South Africa | |
| PQ Silicas South Africa Pty Ltd. | South Africa | |
| Quaker Chemicals South Africa Pty Ltd. 1 | South Africa | |
| PQ International Holdings Inc. | Delaware | |
| PQ Netherlands Holding LLC | Delaware | |
| Potters International Holdings S.à.r.l. | Luxembourg | |
| Potters Leveraged Lender LLC | Delaware | |
| PQ Silicas Asia Pacific Pte Ltd. | Singapore | |
| PQ Silicates Ltd. 2 | Taiwan | |
| PQ International C.V. | Netherlands | |
| PQ Netherlands Cooperative LLC | Delaware | |
| PQ International Coöperatie U.A. | Netherlands | |
| PQ Silicas Brazil Ltda. | Brazil | |
| PQ Acquisition B.V. | Netherlands | |
| PQ Canada Company | Canada | |
| PQ Australia LLC | Delaware | |
| NSL Australia Company | Canada | |
| NSL Canada Company | Canada | |
| National Silicates Partnership | Canada | |
| PQ Europe Coöperatie U.A. | Netherlands | |
| PQ Europe ApS | Denmark | |
| PQ Silicas B.V. | Netherlands | |
| PQ Zeolites B.V. | Netherlands | |
| Zeolyst C.V. 3 | Netherlands | |
| PQ Italy S.r.l. | Italy | |
| PQ France S.A.S. | France | |
| PQ Silicas UK Limited | United Kingdom | |
| PQ Chemicals (Thailand) Limited | Thailand | |
| PQ Holdings Mexicana, S.A. de C.V. 4 | Mexico | |
| Silicatos y Derivados, S.A. de C.V. | Mexico | |
| PQ China (Hong Kong) Limited | Hong Kong | |
| PQ Holdings Australia Pty Limited | Australia | |
| 1 | Represents a joint venture company of which the registrant indirectly owns 49% of the voting equity. |
| 2 | Represents a joint venture company of which the registrant indirectly owns 50% of the voting equity. |
| 3 | Represents a joint venture company of which the registrant indirectly owns 50% of the voting equity. |
| 4 | Represents a joint venture company of which the registrant indirectly owns 80% of the voting equity. |
Exhibit 21.1
| PQ Australia Pty. Limited | Australia | |
| PQ Mexico Holdings B.V. | Netherlands | |
| PQ Mexico S. de R.L. de C.V. | Mexico | |
| Zeolyst International 5 | Kansas | |
| Eco Services Operations Corp. | Delaware | |
| PQ Asia Inc. | Delaware | |
| Potters Netherlands Holding LLC | Delaware | |
| Potters Netherlands Holdings I C.V. | Netherlands | |
| Potters Netherlands Holdings II B.V. | Netherlands | |
| Sovitec Mondial S.A. | Belgium | |
| Sovitec International B.V. | Netherlands | |
| Sovitec Belgium S.A. | Belgium | |
| Beads Belgium S.A. | Belgium | |
| Sovitec Iberica, S.A. | Spain | |
| Asociación para el Estudio de las Tecnologias de Equipamiento de Carreteras, S.A. 8 | Spain | |
| Sovitec France S.A.S. | France | |
| Glass Beads S.A. | Argentina | |
KILT, LLC 6 | Delaware | |
| Delpen Corporation | Delaware | |
| Commercial Research Associates, Inc. | Pennsylvania | |
| PQ Systems Incorporated | Pennsylvania | |
| PQ Export Company | Delaware | |
| PQ International, Inc. | Pennsylvania | |
| Philadelphia Quartz Company | Pennsylvania | |
| Potters Holdings GP, Ltd. | Cayman Islands | |
| Potters Holdings, LP | Cayman Islands | |
| Potters Holdings II GP, LLC | Delaware | |
| Potters Holdings II, LP | Delaware | |
| Potters Industries Holding, Inc. | Delaware | |
| Potters Industries, LLC | Delaware | |
| SAJB Holding Company, LLC | Delaware | |
| Potters Ballotini S.A.S. | France | |
| Societe Recyclage Produit Verrier Industriels SAS | France | |
| Interminglass Sp. Z.o.o. | Poland | |
| Interminglass Holding Sp. z.o.o. | Poland | |
| Potters (Thailand) Limited 7 | Thailand | |
| Potters Industries Acquisition Pty. Ltd. | Australia | |
| Potters Industries Pty. Ltd. | Australia | |
| Potters Industrial Limitada | Brazil | |
| Potters Canada Holding Company | Canada | |
| Potters Canada Holding II Company | Canada | |
| PNA Partnership | Canada | |
| Potters-Ballotini Co., Ltd. | Japan | |
| Potters Nederland B.V. | Netherlands | |
| Ballotini Panamericana S. de R.L. de C.V. | Mexico | |
| Potters Ballotini Acquisition GmbH | Germany | |
| Potters Ballotini GmbH | Germany | |
| Potters Ballotini Ltd. | United Kingdom | |
| Northern Cullet Ltd. | United Kingdom | |
| 5 | Represents a joint venture company of which the registrant indirectly owns 50% of the voting equity. |
| 6 | Represents a joint venture company of which the registrant indirectly owns 72.5% of the voting equity. |
| 7 | Represents a joint venture company of which the registrant indirectly owns approximately 75% of the voting equity. |
| 8 | Represents a joint venture company of which the registrant indirectly owns approximately 22% of the voting equity. |