Hemoglobin Maintenance in Pediatric ESRD (End-stage Renal Disease) Patients by Ferric Pyrophosphate Citrate (FPC)

Inclusion Criteria: A patient will be eligible for inclusion in the study only if all of the following criteria are met: 1. Parents/legal guardians of the patient have the ability to understand the requirements of the study and have demonstrated a willingness to have their child comply with all study procedures by signing an institutional review board-approved informed consent form. Where applicable, assent of the patient has also been obtained for all study procedures prior to any study-related activities. 2. Patient is between 6 months and \<18 years of age at screening. 3. Patient has chronic kidney disease receiving in-center hemodialysis at least twice weekly for at least 3 months prior to screening. 4. Patient is receiving adequate hemodialysis as assessed by the investigator and based on a single pool Kt/V measurement \>1.2. 5. Patient has a vascular access (tunneled catheter, AV fistula or AV graft) suitable to support blood flows for hemodialysis treatment. 6. Patient has a body mass of ≥11 lbs (5 kg). 7. Patient is iron-replete as measured by a TSAT ≥ 20% and a ferritin \>100 µg/L at screening. 8. Patient has a whole blood Hgb concentration of ≥ 9.5 g/dL at screening. 9. If the patient is female, she must be pre-pubertal, have had documented surgical sterilization prior to Baseline admission, or be practicing adequate birth control. All female patients who have reached menarche must have a negative serum pregnancy test during screening. It is the investigator's responsibility to determine whether the patient has adequate birth control for study participation. 10. Patients who have experienced a previous adverse event with IV iron products are eligible to participate in this study if the agent that caused the event is not administered during the Baseline period. Exclusion Criteria: A patient will not be eligible for inclusion in the study if any of the following criteria apply: 1. Patient is positive for human immunodeficiency virus (HIV) or hepatitis B by history. 2. Patient is receiving intravenous or oral antibiotics or antifungals for any infectious process. (Prophylactic antibiotics administered on a regular basis are allowed. Patients may enter the study once the infection has cleared.) 3. Patient has evidence of an ongoing active inflammatory process (e.g., systemic lupus erythematosus, acute or chronic active hepatitis, etc.) requiring treatment. 4. Patient has been dosed in an investigational drug study within the 30 days prior to Baseline. 5. Administration of iron containing phosphate binder ferric citrate (Auryxia) or sucroferric oxyhydroxide (Velphoro) within 2 weeks prior to Baseline. (Patient is only eligible if iron based binders are stopped at least 2 weeks prior to Baseline).