Skip to main content
Calcimator

Chemical Storage Compatibility Calculator

Assess chemical storage compatibility and segregation requirements based on hazard ratings for acids, bases, oxidizers, flammables, and toxics.

Inputs

(0-3)
(0-3)
(0-3)
(0-3)
(0-3)

Results

Compatibility Score

2 / 100

Segregation Level

1 (1-4)

Storage Class2
Risk Score0.2 / 10
How to Use This Calculator
  1. Rate the Acid hazard of the chemical on a 0–3 scale: 0 = none, 1 = mild acid, 2 = moderate acid, 3 = strong acid (e.g., sulfuric or hydrochloric).
  2. Rate the Base/Alkali hazard: 0 = none, 1 = mild, 2 = moderate, 3 = strong base (e.g., sodium hydroxide).
  3. Rate the Oxidizer hazard: 0 = none, 1 = mild, 2 = moderate, 3 = strong oxidizer (e.g., nitric acid, hydrogen peroxide).
  4. Rate Flammability: 0 = non-flammable, 1 = combustible, 2 = flammable, 3 = highly flammable (e.g., solvents, fuels).
  5. Rate Toxicity: 0 = non-toxic, 1 = slightly toxic, 2 = toxic, 3 = highly toxic (e.g., cyanides, chlorine).
  6. Review the Compatibility Score out of 100, the Segregation Level (1–4), and Storage Class to determine if chemicals can share a storage area or require physical separation per NFPA 400 and OSHA 1910.106.

How the result changes with Toxic Rating

Toxic RatingCompatibility ScoreSegregation Level
0.31 / 1001 (1-4)
1.052 / 1001 (1-4)
1.954 / 1001 (1-4)
2.76 / 1001 (1-4)

What each input means

Acid Rating
Acid hazard rating: 0 = none, 1 = mild, 2 = moderate, 3 = strong acid.
Base Rating
Base/alkali hazard rating: 0 = none, 1 = mild, 2 = moderate, 3 = strong base.
Oxidizer Rating
Oxidizer hazard rating: 0 = none, 1 = mild, 2 = moderate, 3 = strong oxidizer.
Flammable Rating
Flammability rating: 0 = non-flammable, 1 = combustible, 2 = flammable, 3 = highly flammable.
Toxic Rating
Toxicity rating: 0 = non-toxic, 1 = slightly toxic, 2 = toxic, 3 = highly toxic.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Acid Rating = 1, Base Rating = 0, Oxidizer Rating = 0, Flammable Rating = 2 = 5 input(s) provided
  2. Calculate Compatibility Score
    Compatibility Score
    2 = 2
  3. Calculate Segregation Level
    1 = 1
  4. Calculate Storage Class
    Storage Class
    2 = 2
  5. Calculate Risk Score
    Risk Score
    0.2 = 0.2

Engine last updated . Checked against 3 independently-derived tests — how we verify calculators.

Related Calculators

The questions that sit next to this one — chosen by subject, including calculators filed under a different category.

Chemical Engineering

Mass Balance Calculator

Perform overall and component mass balances for a single-unit process with feed, product, waste, and recycle streams.

Chemical Engineering

Heat of Reaction Calculator

Calculate the standard enthalpy of reaction (ΔH) from formation enthalpies of reactants and products using Hess's Law.

OSHA & Workplace Safety

PPE Selection Calculator

Determine required PPE categories and estimated costs from hazard assessment.

Chemical Engineering

Distillation Column Calculator

Estimate minimum and actual theoretical stages, minimum reflux ratio, and feed stage location using the McCabe-Thiele simplified approach.

More in Engineering.