Skip to main content
U.S. flag

An official website of the United States government

Here’s how you know

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

HTTPS

Secure .gov websites use HTTPS
A lock (LockA locked padlock) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Emergency

This is not the current EPA website. To navigate to the current EPA website, please go to www.epa.gov. This website is historical material reflecting the EPA website as it existed on January 19, 2025. This website is no longer updated and links to external websites and some internal pages may not work. More information »

    • Environmental Topics
    • Air
    • Bed Bugs
    • Cancer
    • Chemicals, Toxics, and Pesticide
    • Climate Change
    • Emergency Response
    • Environmental Information by Location
    • Environmental Justice
    • Greener Living
    • Health
    • Land, Waste, and Cleanup
    • Lead
    • Mold
    • Radon
    • Research
    • Science Topics
    • Water Topics
    • A-Z Topic Index
    • Laws & Regulations
    • By Business Sector
    • By Topic
    • Compliance
    • Enforcement
    • Laws and Executive Orders
    • Regulations
    • Report a Violation
    • Environmental Violations
    • Fraud, Waste or Abuse
    • About EPA
    • Our Mission and What We Do
    • Headquarters Offices
    • Regional Offices
    • Labs and Research Centers
    • Planning, Budget, and Results
    • Organization Chart
    • EPA History
    • Staff Directory

Breadcrumb

  1. Home
  2. Air Emissions Factors and Quantification

AP 42, Fifth Edition, Volume I Chapter 8: Inorganic Chemical Industry

 
8.0 Introduction to Inorganic Chemical Industry (PDF) (1 pg, 10 K, About PDF)
 
8.1 Synthetic Ammonia

  • Final Section - July 1993 (PDF) (6 pp, 88 K, About PDF)
  • Background Document (PDF) (37 pp, 159 K)

 
8.2 Urea

  • Final Section - July 1993 (PDF) (6 pp, 53 K)
  • Background Document (PDF) (48 pp, 197 K)

 
8.3 Ammonium Nitrate

  • Final Section - July 1993 (PDF) (9 pp, 86 K)
  • Background Document (PDF) (74 pp, 192 K)

 
8.4 Ammonium Sulfate

  • Final Section - October 1996 (PDF) (4 pp, 113 K)
  • Background Document (PDF) (33 pp, 134 K)

 
8.5 Introduction to Phosphate Fertilizers

  • Background Document (PDF) (50 pp, 176 K)

8.5.1 Normal Superphosphates

  • Final Section - July 1993 (PDF) (4 pp, 66 K)

8.5.2 Triple Superphosphates

  • Final Section - July 1993 (PDF) (5 pp, 79 K)

8.5.3 Ammonium Phosphate

  • Final Section - July 1993 (PDF) (5 pp, 68 K)

 
8.6 Hydrochloric Acid

  • Final Section - July 1993 (PDF) (3 pp, 46 K)
  • Background Document (PDF) (26 pp, 51 K)

 
8.7 Hydrofluoric Acid

  • Final Section - July 1993 (PDF) (5 pp, 83 K)
  • Background Document (PDF) (39 pp, 93 K)

 
8.8 Nitric Acid

  • Final Section - February 1998 (PDF) (7 pp, 52 K)
  • Background Document (PDF) (40 pp, 141 K)

 
8.9 Phosphoric Acid

  • Final Section - July 1993 (PDF) (8 pp, 176 K)
  • Background Document (PDF) (50 pp, 218 K)

 
8.10 Sulfuric Acid

  • Final Section - July 1993 (PDF) (75 pp, 178 K)
  • Background Document (PDF) (37 pp, 159 K)

 
8.11 Chlor-Alkali

  • Final Section - July 1993 (PDF) (6 pp, 112 K)
  • Background Document (PDF) (41 pp, 90 K)

 
8.12 Sodium Carbonate

  • Final Section - July 1993 (PDF) (7 pp, 63 K)
  • Background Document (PDF) (114 pp, 308 K)

 
8.13 Sulfur Recovery

  • Final Section - April 2015 (PDF) (9 pp, 355 K)
  • Background Documents - April 2015 (ZIP) (zip)
  • Related Information - Updated April 2015

AP 42 Emissions Factors by Chapter

Air Emissions Factors and Quantification

  • Basic Information
  • AP-42
  • Emissions Estimation Tools
Contact Us about Air Emissions Factors
Contact Us about Air Emissions Factors to ask a question, provide feedback, or report a problem.
Last updated on December 12, 2024
  • Assistance
  • Ayuda
  • Arabic
  • Chinese (simplified)
  • Chinese (traditional)
  • Aide
  • Asistans
  • Korean
  • Assistência
  • Russian
  • Tulong
  • Vietnamese
United States Environmental Protection Agency

Discover.

  • Accessibility Statement
  • Budget & Performance
  • Contracting
  • EPA www Web Snapshot
  • Grants
  • No FEAR Act Data
  • Plain Writing
  • Privacy
  • Privacy and Security Notice

Connect.

  • Data
  • Inspector General
  • Jobs
  • Newsroom
  • Regulations.gov
  • Subscribe
  • USA.gov
  • White House

Ask.

  • Contact EPA
  • EPA Disclaimers
  • Hotlines
  • FOIA Requests
  • Frequent Questions

Follow.