**Exhibit 99.1**

**UNAUDITED PROFORMA CONDENSED CONSOLIDATED FINANCIAL INFORMATION**

The following unaudited pro formainformation is derived from our financial statements included elsewhere in thisreport, adjusted to give pro forma effect to the Transactions as if theTransactions had occurred on January 1, 2005. The unaudited pro formafinancial information is presented for the year ended December 31, 2005. TheCompany is referred to as the “Successor” for the historical forty-six weekperiod ended December 31, 2005 and the “Predecessor” for the historical sixweek period ended February 11, 2005.

The unaudited pro formaadjustments are based upon available information, the structure of theTransactions and certain assumptions that we believe are reasonable under thecircumstances. The unaudited pro forma financial information does not purportto represent what our results of operations would have been had theTransactions actually occurred on the date indicated, nor do they purport toproject our results of operations for any future period. The information setforth below should be read together with the other information contained underthe captions “Item 6. Selected Financial Data”, “Item 7.  Management’s Discussion and Analysis ofFinancial Condition and Results of Operations” and “Item 8. FinancialStatements and Supplementary Data.”

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**PQ Corporation and Subsidiaries**

**Unaudited Pro Forma Condensed Consolidated Statementsof Operations**

**for the Twelve Months Ended December 31, 2005**

**(in thousands)**

 
| ** **                                             | ** ** | **Historical** | ** ** | ** **      | ** ** | ** **      | ** ** | ** **         | ** **   |
|--------------------------------------------------------|------------|----------------|------------|-----------------|------------|-----------------|------------|--------------------|--------------|
| ** **                                             | ** ** | **Successor**  | ** ** | **Predecessor** | ** ** | **Adjustments** | ** ** | **Pro Forma** | ** **   |
|                                                   | ** ** | ** **     | ** ** | ** **      | ** ** | ** **      | ** ** | ** **         | ** **   |
| Sales                                                  |       | $              | 571,138    |            | $          | 64,195          |       | $                  | —  |   | $ | 635,333 |   |
| Cost of goods  sold                                    |       | 463,102        |       | 48,576          |       | 83         | (a)        | 504,876            |         |
|                                                   |       |           |       |            |       | (10,935)        | (b)        |               |         |
|                                                   |       |           |       |            |       | 4,050      | (d)        |               |         |
| Gross profit                                           |       | 108,036        |       | 15,619          |       | 6,802      |       | 130,457            |         |
| Selling, general  and administrative expense           |       | 77,317         |       | 11,221          |       | 10         | (a)        | 82,297             |         |
|                                                   |       |           |       |            |       | (430)           | (c)        |               |         |
|                                                   |       |           |       |            |       | (2,405)         | (g)        |               |         |
|                                                   |       |           |       |            |       | (3,338)         | (h)        |               |         |
|                                                   |       |           |       |            |       | (78)            | (d)        |               |         |
| Other operating  expense (income)                      |       | 22,558         |       | 12,267          |       | 653        | (d)        | 7,578              |         |
|                                                   |       |           |       |            |       | (29,900)        | (i)        |               |         |
|                                                   |       |           |       |            |       | 2,000      | (l)        |               |         |
| Operating income (loss)                                |       | 8,161          |       | (7,869          | )          | 40,290     |       | 40,582             |         |
| Equity in net  income (loss) from affiliated companies |       | 3,108          |       | (265            | )          | 4,940      | (k)        | 7,783              |         |
| Interest  expense, net                                 |       | 37,529         |       | 771             |       | 4,804      | (e)        | 43,104             |         |
| Other  non-operating expense (income), net             |       | 8,218          |       | 356             |       | (7,579)         | (j)        | 995                |         |
| Income (loss) before income taxes                      |       | (34,478        | )          | (9,261          | )          | 48,005     |       | 4,266              |         |
| Provision  (benefit) for income taxes                  |       | 361            |       | (2,522          | )          | 11,176     | (f)        | 9,015              |         |
| Minority  interest                                     |       | 307            |       | 59              |       | (66)            |       | 300                |         |
| Net (loss) income                                      |       | $              | (35,146    | )               | $          | (6,798          | )          | $                  | 36,895  |   | $ | (5,049 | ) |

 

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**PQ Corporation and Subsidiaries**

**Notes to Unaudited Pro Forma Condensed ConsolidatedStatements of Operations**

**(in thousands)**

a.               Represents incremental depreciation expense onfair market value adjustments for property plant and equipment. The companyestimated an average useful life of 20 years for buildings andimprovements, 6.5 years for plant and equipment and 4 years for otherpersonal property for the property plant and equipment valuation adjustments.

b.              Represents elimination of the impact on cost ofgoods sold resulting from the sale of the FIFO and average cost basis inventorythat was revalued in purchase accounting in order to eliminate manufacturer’sprofit.

c.               Represents the reduction in pension expense due toelimination of amortization expense associated with the unamortized transitionobligation, and unrecognized actuarial losses and prior service costs that wererecognized in connection with the application of purchase accounting.

d.              Represents the amortization expense on thepurchase accounting adjustments for identifiable intangible assets.Amortization periods on the purchase accounting adjustments are 40 yearsfor customer relationships, 12 years for technical know-how, 3 yearsfor non-compete agreements and approximately 3 years for suppliercontracts. Trade names have been determined to have indefinite lives.

e.               Increased interest expense is based upon thefollowing pro forma amounts of debt giving effect to the financing of theMerger and Transactions:
| ** **                                                                                             | ** ** | **Year ended  December 31,  2005** | ** ** |
|--------------------------------------------------------------------------------------------------------|------------|----------------------------------------------|------------|
| ** **                                                                                             |       |                                         |       |
| Subordinated  Notes (1)                                                                                |       | $                                            | 20,625     |   |
| Senior Credit  Facility (1)(3)                                                                         |       | 18,425                                       |       |
| Revolving Credit  Facility commitment fee (1)                                                          |       | 500                                          |       |
| Deferred  financing fees (2)                                                                           |       | 2,260                                        |       |
| Adjustment to  reverse historical interest expense, net of interest on capital leases still  in effect |       | (37,006                                      | )          |
|                                                                                                   |       |                                         |       |
| Total                                                                                                  |       | $                                            | 4,804      |   |

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1)                 The interest rateis 7.5% on the $275,000 subordinated notes and 5.5% on the $335,000 seniorcredit facility (LIBOR plus 200 basis points) for the term loan with acommitment fee of 0.5% on the unutilized portion of the revolving creditfacility. None of the $100,000 revolver was utilized in the pro forma financialstatements.

2)                 Capitalized debtissuance costs of $16,503 amortized over a range of 6-8 years.  In the historical financial statements,amortization of debt issuance costs was included in other non-operatingexpense.

3)                 A change in theinterest rate of one-eighth of one percent would change interest expense by$419, assuming the revolver was undrawn.

f.                 Income taxes reflect the tax effect of the proforma adjustments on a consolidated company basis. The net tax benefit iscalculated at blended federal and state rate of 38.25%, consisting of a federaltax rate of 35% and an average state tax rate of 5.5% (3.25% after-tax), takinginto consideration adjustments for certain non-deductible expenses.

g.              Represents the reversal of stock compensationexpense related to the acceleration of the Predecessor’s stock options andawards that vested in connection with the Transactions.

h.              Represents the reversal of the write-off ofin-process research and development capitalized and immediately written-offin purchase accounting.

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i.                  Represents elimination of the followingtransaction costs relating to the sale of the company that were expensed duringthe twelve months ended December 31, 2005:

 
| ** **                       | ** ** | **Year ended  December 31,  2005** | ** ** |
|----------------------------------|------------|----------------------------------------------|------------|
|                             |       |                                         |       |
| Sponsor and  broker fees         |       | $                                            | 15,096     |   |
| Severance                        |       | 9,533                                        |       |
| Legal and  consulting            |       | 3,757                                        |       |
| Other  transaction related costs |       | 1,514                                        |       |
|                             |       |                                         |       |
| Total                            |       | $                                            | 29,900     |   |

 

j.                  Represents elimination of $5,279 of make-wholefees due to the prepayment of existing debt and bridge financing fees of $2,300related to the Transactions that were expensed during the twelve months endedDecember 31, 2005.

k.               Represents elimination of the impact on equityaffiliates cost of goods sold resulting from the sale of inventory that wasrevalued in purchase accounting in order to eliminate manufacturer’s profit of$5,251 in the successor period ended December 31, 2005.  Equity affiliates depreciation andamortization expense was increased $311 for property, plant and equipment andintangibles fair value adjustments.

l.                  Records an annual monitoring fee of $2,000 payableto the sponsors beginning in 2006.

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